CVE-2026-49332

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-49332", "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "state": "PUBLISHED", "assignerShortName": "redhat", "dateReserved": "2026-05-29T13:28:56.553Z", "datePublished": "2026-07-28T12:18:26.112Z", "dateUpdated": "2026-09-21T16:09:11.495Z"}, "containers": {"cna": {"title": "Openshift/oauth-proxy: openshift/oauth-proxy: underscore header smuggling enables identity impersonation on wsgi/php upstreams", "metrics": [{"other": {"content": {"value": "Important", "namespace": "https://access.redhat.com/security/updates/classification/"}, "type": "Red Hat severity rating"}}, {"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 8.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N", "version": "3.1"}, "format": "CVSS"}], "descriptions": [{"lang": "en", "value": "A flaw was found in openshift/oauth-proxy. The proxy sets authenticated identity headers using only dash-variant keys (X-Forwarded-User) but does not strip underscore-variant keys (X_Forwarded_User) from incoming requests. WSGI and PHP frameworks normalize both variants to the same variable, allowing an authenticated low-privilege user to smuggle a forged identity that may override the legitimate authenticated identity in the upstream application."}], "affected": [{"vendor": "Red Hat", "product": "Red Hat OpenShift Container Platform 4.12", "collectionURL": "https://catalog.redhat.com/software/containers/", "packageName": "openshift4/ose-oauth-proxy", "defaultStatus": "affected", "versions": [{"version": "1786458704", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/a:redhat:openshift:4.12::el9"]}, {"vendor": "Red Hat", "product": "Red Hat OpenShift Container Platform 4.13", "collectionURL": "https://catalog.redhat.com/software/containers/", "packageName": "openshift4/ose-oauth-proxy", "defaultStatus": "affected", "versions": [{"version": "1786477436", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/a:redhat:openshift:4.13::el9"]}, {"vendor": "Red Hat", "product": "Red Hat OpenShift Container Platform 4.14", "collectionURL": "https://catalog.redhat.com/software/containers/", "packageName": "openshift4/ose-oauth-proxy", "defaultStatus": "affected", "versions": [{"version": "1785549818", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/a:redhat:openshift:4.14::el9"]}, {"vendor": "Red Hat", "product": "Red Hat OpenShift Container Platform 4.15", "collectionURL": "https://catalog.redhat.com/software/containers/", "packageName": "openshift4/ose-oauth-proxy-rhel9", "defaultStatus": "affected", "versions": [{"version": "1787054100", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/a:redhat:openshift:4.15::el9"]}, {"vendor": "Red Hat", "product": "Red Hat OpenShift Container Platform 4.16", "collectionURL": "https://catalog.redhat.com/software/containers/", "packageName": "openshift4/ose-oauth-proxy-rhel9", "defaultStatus": "affected", "versions": [{"version": "1785544039", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/a:redhat:openshift:4.16::el9"]}, {"vendor": "Red Hat", "product": "Red Hat OpenShift Container Platform 4.17", "collectionURL": "https://catalog.redhat.com/software/containers/", "packageName": "openshift4/ose-oauth-proxy-rhel9", "defaultStatus": "affected", "versions": [{"version": "1787543313", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/a:redhat:openshift:4.17::el9"]}, {"vendor": "Red Hat", "product": "Red Hat OpenShift Container Platform 4.18", "collectionURL": "https://catalog.redhat.com/software/containers/", "packageName": "openshift4/ose-oauth-proxy-rhel9", "defaultStatus": "affected", "versions": [{"version": "1785529735", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/a:redhat:openshift:4.18::el9"]}, {"vendor": "Red Hat", "product": "Red Hat OpenShift Container Platform 4.19", "collectionURL": "https://catalog.redhat.com/software/containers/", "packageName": "openshift4/ose-oauth-proxy-rhel9", "defaultStatus": "affected", "versions": [{"version": "1785521728", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/a:redhat:openshift:4.19::el9"]}, {"vendor": "Red Hat", "product": "Red Hat OpenShift Container Platform 4.20", "collectionURL": "https://catalog.redhat.com/software/containers/", "packageName": "openshift4/ose-oauth-proxy-rhel9", "defaultStatus": "affected", "versions": [{"version": "1785833742", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/a:redhat:openshift:4.20::el9"]}, {"vendor": "Red Hat", "product": "Red Hat OpenShift Container Platform 4.21", "collectionURL": "https://catalog.redhat.com/software/containers/", "packageName": "openshift4/ose-oauth-proxy-rhel9", "defaultStatus": "affected", "versions": [{"version": "1785851359", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/a:redhat:openshift:4.21::el9"]}, {"vendor": "Red Hat", "product": "Red Hat OpenShift Container Platform 4.22", "collectionURL": "https://catalog.redhat.com/software/containers/", "packageName": "openshift4/ose-oauth-proxy-rhel9", "defaultStatus": "affected", "versions": [{"version": "1785885351", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/a:redhat:openshift:4.22::el9"]}], "references": [{"url": "https://access.redhat.com/errata/RHSA-2026:50681", "name": "RHSA-2026:50681", "tags": ["vendor-advisory", "x_refsource_REDHAT"]}, {"url": "https://access.redhat.com/errata/RHSA-2026:50758", "name": "RHSA-2026:50758", "tags": ["vendor-advisory", "x_refsource_REDHAT"]}, {"url": "https://access.redhat.com/errata/RHSA-2026:51007", "name": "RHSA-2026:51007", "tags": ["vendor-advisory", "x_refsource_REDHAT"]}, {"url": "https://access.redhat.com/errata/RHSA-2026:51013", "name": "RHSA-2026:51013", "tags": ["vendor-advisory", "x_refsource_REDHAT"]}, {"url": "https://access.redhat.com/errata/RHSA-2026:51022", "name": "RHSA-2026:51022", "tags": ["vendor-advisory", "x_refsource_REDHAT"]}, {"url": "https://access.redhat.com/errata/RHSA-2026:51025", "name": "RHSA-2026:51025", "tags": ["vendor-advisory", "x_refsource_REDHAT"]}, {"url": "https://access.redhat.com/errata/RHSA-2026:51038", "name": "RHSA-2026:51038", "tags": ["vendor-advisory", "x_refsource_REDHAT"]}, {"url": "https://access.redhat.com/errata/RHSA-2026:54188", "name": "RHSA-2026:54188", "tags": ["vendor-advisory", "x_refsource_REDHAT"]}, {"url": "https://access.redhat.com/errata/RHSA-2026:54206", "name": "RHSA-2026:54206", "tags": ["vendor-advisory", "x_refsource_REDHAT"]}, {"url": "https://access.redhat.com/errata/RHSA-2026:56912", "name": "RHSA-2026:56912", "tags": ["vendor-advisory", "x_refsource_REDHAT"]}, {"url": "https://access.redhat.com/errata/RHSA-2026:60023", "name": "RHSA-2026:60023", "tags": ["vendor-advisory", "x_refsource_REDHAT"]}, {"url": "https://access.redhat.com/security/cve/CVE-2026-49332", "tags": ["vdb-entry", "x_refsource_REDHAT"]}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2483253", "name": "RHBZ#2483253", "tags": ["issue-tracking", "x_refsource_REDHAT"]}], "datePublic": "2026-07-28T12:00:00.000Z", "problemTypes": [{"descriptions": [{"cweId": "CWE-436", "description": "Interpretation Conflict", "lang": "en", "type": "CWE"}]}], "x_redhatCweChain": "CWE-436: Interpretation Conflict", "workarounds": [{"lang": "en", "value": "Upstream application hardening: validate X-Forwarded-User against the expected session identity. Reject requests where identity headers do not match the authenticated session."}], "timeline": [{"lang": "en", "time": "2026-04-17T00:00:00.000Z", "value": "Reported to Red Hat."}, {"lang": "en", "time": "2026-07-28T12:00:00.000Z", "value": "Made public."}], "credits": [{"lang": "en", "value": "This issue was discovered by Jeremy Choi (Red Hat)."}], "providerMetadata": {"orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "shortName": "redhat", "dateUpdated": "2026-09-21T16:09:11.495Z"}, "x_generator": {"engine": "cvelib 1.8.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-07-28T13:02:35.727357Z", "id": "CVE-2026-49332", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-28T13:03:08.605Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-49332", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-28T13:02:35.727357Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-28T13:03:03.200Z"}}], "cna": {"title": "Openshift/oauth-proxy: openshift/oauth-proxy: underscore header smuggling enables identity impersonation on wsgi/php upstreams", "credits": [{"lang": "en", "value": "This issue was discovered by Jeremy Choi (Red Hat)."}], "metrics": [{"other": {"type": "Red Hat severity rating", "content": {"value": "Important", "namespace": "https://access.redhat.com/security/updates/classification/"}}}, {"format": "CVSS", "cvssV3_1": {"scope": "CHANGED", "version": "3.1", "baseScore": 8.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}}], "affected": [{"cpes": ["cpe:/a:redhat:openshift:4.12::el9"], "vendor": "Red Hat", "product": "Red Hat OpenShift Container Platform 4.12", "versions": [{"status": "unaffected", "version": "1786458704", "lessThan": "*", "versionType": "rpm"}], "packageName": "openshift4/ose-oauth-proxy", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:openshift:4.13::el9"], "vendor": "Red Hat", "product": "Red Hat OpenShift Container Platform 4.13", "versions": [{"status": "unaffected", "version": "1786477436", "lessThan": "*", "versionType": "rpm"}], "packageName": "openshift4/ose-oauth-proxy", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:openshift:4.14::el9"], "vendor": "Red Hat", "product": "Red Hat OpenShift Container Platform 4.14", "versions": [{"status": "unaffected", "version": "1785549818", "lessThan": "*", "versionType": "rpm"}], "packageName": "openshift4/ose-oauth-proxy", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:openshift:4.15::el9"], "vendor": "Red Hat", "product": "Red Hat OpenShift Container Platform 4.15", "versions": [{"status": "unaffected", "version": "1787054100", "lessThan": "*", "versionType": "rpm"}], "packageName": "openshift4/ose-oauth-proxy-rhel9", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:openshift:4.16::el9"], "vendor": "Red Hat", "product": "Red Hat OpenShift Container Platform 4.16", "versions": [{"status": "unaffected", "version": "1785544039", "lessThan": "*", "versionType": "rpm"}], "packageName": "openshift4/ose-oauth-proxy-rhel9", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:openshift:4.17::el9"], "vendor": "Red Hat", "product": "Red Hat OpenShift Container Platform 4.17", "versions": [{"status": "unaffected", "version": "1787543313", "lessThan": "*", "versionType": "rpm"}], "packageName": "openshift4/ose-oauth-proxy-rhel9", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:openshift:4.18::el9"], "vendor": "Red Hat", "product": "Red Hat OpenShift Container Platform 4.18", "versions": [{"status": "unaffected", "version": "1785529735", "lessThan": "*", "versionType": "rpm"}], "packageName": "openshift4/ose-oauth-proxy-rhel9", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:openshift:4.19::el9"], "vendor": "Red Hat", "product": "Red Hat OpenShift Container Platform 4.19", "versions": [{"status": "unaffected", "version": "1785521728", "lessThan": "*", "versionType": "rpm"}], "packageName": "openshift4/ose-oauth-proxy-rhel9", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:openshift:4.20::el9"], "vendor": "Red Hat", "product": "Red Hat OpenShift Container Platform 4.20", "versions": [{"status": "unaffected", "version": "1785833742", "lessThan": "*", "versionType": "rpm"}], "packageName": "openshift4/ose-oauth-proxy-rhel9", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:openshift:4.21::el9"], "vendor": "Red Hat", "product": "Red Hat OpenShift Container Platform 4.21", "versions": [{"status": "unaffected", "version": "1785851359", "lessThan": "*", "versionType": "rpm"}], "packageName": "openshift4/ose-oauth-proxy-rhel9", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:openshift:4.22::el9"], "vendor": "Red Hat", "product": "Red Hat OpenShift Container Platform 4.22", "versions": [{"status": "unaffected", "version": "1785885351", "lessThan": "*", "versionType": "rpm"}], "packageName": "openshift4/ose-oauth-proxy-rhel9", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}], "timeline": [{"lang": "en", "time": "2026-04-17T00:00:00.000Z", "value": "Reported to Red Hat."}, {"lang": "en", "time": "2026-07-28T12:00:00.000Z", "value": "Made public."}], "datePublic": "2026-07-28T12:00:00.000Z", "references": [{"url": "https://access.redhat.com/errata/RHSA-2026:50681", "name": "RHSA-2026:50681", "tags": ["vendor-advisory", "x_refsource_REDHAT"]}, {"url": "https://access.redhat.com/errata/RHSA-2026:50758", "name": "RHSA-2026:50758", "tags": ["vendor-advisory", "x_refsource_REDHAT"]}, {"url": "https://access.redhat.com/errata/RHSA-2026:51007", "name": "RHSA-2026:51007", "tags": ["vendor-advisory", "x_refsource_REDHAT"]}, {"url": "https://access.redhat.com/errata/RHSA-2026:51013", "name": "RHSA-2026:51013", "tags": ["vendor-advisory", "x_refsource_REDHAT"]}, {"url": "https://access.redhat.com/errata/RHSA-2026:51022", "name": "RHSA-2026:51022", "tags": ["vendor-advisory", "x_refsource_REDHAT"]}, {"url": "https://access.redhat.com/errata/RHSA-2026:51025", "name": "RHSA-2026:51025", "tags": ["vendor-advisory", "x_refsource_REDHAT"]}, {"url": "https://access.redhat.com/errata/RHSA-2026:51038", "name": "RHSA-2026:51038", "tags": ["vendor-advisory", "x_refsource_REDHAT"]}, {"url": "https://access.redhat.com/errata/RHSA-2026:54188", "name": "RHSA-2026:54188", "tags": ["vendor-advisory", "x_refsource_REDHAT"]}, {"url": "https://access.redhat.com/errata/RHSA-2026:54206", "name": "RHSA-2026:54206", "tags": ["vendor-advisory", "x_refsource_REDHAT"]}, {"url": "https://access.redhat.com/errata/RHSA-2026:56912", "name": "RHSA-2026:56912", "tags": ["vendor-advisory", "x_refsource_REDHAT"]}, {"url": "https://access.redhat.com/errata/RHSA-2026:60023", "name": "RHSA-2026:60023", "tags": ["vendor-advisory", "x_refsource_REDHAT"]}, {"url": "https://access.redhat.com/security/cve/CVE-2026-49332", "tags": ["vdb-entry", "x_refsource_REDHAT"]}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2483253", "name": "RHBZ#2483253", "tags": ["issue-tracking", "x_refsource_REDHAT"]}], "workarounds": [{"lang": "en", "value": "Upstream application hardening: validate X-Forwarded-User against the expected session identity. Reject requests where identity headers do not match the authenticated session."}], "x_generator": {"engine": "cvelib 1.8.0"}, "descriptions": [{"lang": "en", "value": "A flaw was found in openshift/oauth-proxy. The proxy sets authenticated identity headers using only dash-variant keys (X-Forwarded-User) but does not strip underscore-variant keys (X_Forwarded_User) from incoming requests. WSGI and PHP frameworks normalize both variants to the same variable, allowing an authenticated low-privilege user to smuggle a forged identity that may override the legitimate authenticated identity in the upstream application."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-436", "description": "Interpretation Conflict"}]}], "providerMetadata": {"orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "shortName": "redhat", "dateUpdated": "2026-09-21T16:09:11.495Z"}, "x_redhatCweChain": "CWE-436: Interpretation Conflict"}}, "cveMetadata": {"cveId": "CVE-2026-49332", "state": "PUBLISHED", "dateUpdated": "2026-09-21T16:09:11.495Z", "dateReserved": "2026-05-29T13:28:56.553Z", "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "datePublished": "2026-07-28T12:18:26.112Z", "assignerShortName": "redhat"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"collectionURL": "https://catalog.redhat.com/software/containers/", "cpes": ["cpe:/a:redhat:openshift:4.12::el9"], "defaultStatus": "affected", "packageName": "openshift4/ose-oauth-proxy", "product": "Red Hat OpenShift Container Platform 4.12", "vendor": "Red Hat", "versions": [{"lessThan": "*", "status": "unaffected", "version": "1786458704", "versionType": "rpm"}]}, {"collectionURL": "https://catalog.redhat.com/software/containers/", "cpes": ["cpe:/a:redhat:openshift:4.13::el9"], "defaultStatus": "affected", "packageName": "openshift4/ose-oauth-proxy", "product": "Red Hat OpenShift Container Platform 4.13", "vendor": "Red Hat", "versions": [{"lessThan": "*", "status": "unaffected", "version": "1786477436", "versionType": "rpm"}]}, {"collectionURL": "https://catalog.redhat.com/software/containers/", "cpes": ["cpe:/a:redhat:openshift:4.14::el9"], "defaultStatus": "affected", "packageName": "openshift4/ose-oauth-proxy", "product": "Red Hat OpenShift Container Platform 4.14", "vendor": "Red Hat", "versions": [{"lessThan": "*", "status": "unaffected", "version": "1785549818", "versionType": "rpm"}]}, {"collectionURL": "https://catalog.redhat.com/software/containers/", "cpes": ["cpe:/a:redhat:openshift:4.15::el9"], "defaultStatus": "affected", "packageName": "openshift4/ose-oauth-proxy-rhel9", "product": "Red Hat OpenShift Container Platform 4.15", "vendor": "Red Hat", "versions": [{"lessThan": "*", "status": "unaffected", "version": "1787054100", "versionType": "rpm"}]}, {"collectionURL": "https://catalog.redhat.com/software/containers/", "cpes": ["cpe:/a:redhat:openshift:4.16::el9"], "defaultStatus": "affected", "packageName": "openshift4/ose-oauth-proxy-rhel9", "product": "Red Hat OpenShift Container Platform 4.16", "vendor": "Red Hat", "versions": [{"lessThan": "*", "status": "unaffected", "version": "1785544039", "versionType": "rpm"}]}, {"collectionURL": "https://catalog.redhat.com/software/containers/", "cpes": ["cpe:/a:redhat:openshift:4.17::el9"], "defaultStatus": "affected", "packageName": "openshift4/ose-oauth-proxy-rhel9", "product": "Red Hat OpenShift Container Platform 4.17", "vendor": "Red Hat", "versions": [{"lessThan": "*", "status": "unaffected", "version": "1787543313", "versionType": "rpm"}]}, {"collectionURL": "https://catalog.redhat.com/software/containers/", "cpes": ["cpe:/a:redhat:openshift:4.18::el9"], "defaultStatus": "affected", "packageName": "openshift4/ose-oauth-proxy-rhel9", "product": "Red Hat OpenShift Container Platform 4.18", "vendor": "Red Hat", "versions": [{"lessThan": "*", "status": "unaffected", "version": "1785529735", "versionType": "rpm"}]}, {"collectionURL": "https://catalog.redhat.com/software/containers/", "cpes": ["cpe:/a:redhat:openshift:4.19::el9"], "defaultStatus": "affected", "packageName": "openshift4/ose-oauth-proxy-rhel9", "product": "Red Hat OpenShift Container Platform 4.19", "vendor": "Red Hat", "versions": [{"lessThan": "*", "status": "unaffected", "version": "1785521728", "versionType": "rpm"}]}, {"collectionURL": "https://catalog.redhat.com/software/containers/", "cpes": ["cpe:/a:redhat:openshift:4.20::el9"], "defaultStatus": "affected", "packageName": "openshift4/ose-oauth-proxy-rhel9", "product": "Red Hat OpenShift Container Platform 4.20", "vendor": "Red Hat", "versions": [{"lessThan": "*", "status": "unaffected", "version": "1785833742", "versionType": "rpm"}]}, {"collectionURL": "https://catalog.redhat.com/software/containers/", "cpes": ["cpe:/a:redhat:openshift:4.21::el9"], "defaultStatus": "affected", "packageName": "openshift4/ose-oauth-proxy-rhel9", "product": "Red Hat OpenShift Container Platform 4.21", "vendor": "Red Hat", "versions": [{"lessThan": "*", "status": "unaffected", "version": "1785851359", "versionType": "rpm"}]}, {"collectionURL": "https://catalog.redhat.com/software/containers/", "cpes": ["cpe:/a:redhat:openshift:4.22::el9"], "defaultStatus": "affected", "packageName": "openshift4/ose-oauth-proxy-rhel9", "product": "Red Hat OpenShift Container Platform 4.22", "vendor": "Red Hat", "versions": [{"lessThan": "*", "status": "unaffected", "version": "1785885351", "versionType": "rpm"}]}], "source": "secalert@redhat.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A flaw was found in openshift/oauth-proxy. The proxy sets authenticated identity headers using only dash-variant keys (X-Forwarded-User) but does not strip underscore-variant keys (X_Forwarded_User) from incoming requests. WSGI and PHP frameworks normalize both variants to the same variable, allowing an authenticated low-privilege user to smuggle a forged identity that may override the legitimate authenticated identity in the upstream application."}, {"lang": "es", "value": "Se encontr\u00f3 una vulnerabilidad en openshift/oauth-proxy. El proxy establece encabezados de identidad autenticada utilizando solo claves con variantes de guion (X-Forwarded-User) pero no elimina las claves con variantes de guion bajo (X_Forwarded_User) de las solicitudes entrantes. Los frameworks WSGI y PHP normalizan ambas variantes a la misma variable, permitiendo a un usuario autenticado con bajos privilegios introducir clandestinamente una identidad falsificada que puede anular la identidad autenticada leg\u00edtima en la aplicaci\u00f3n ascendente."}], "id": "CVE-2026-49332", "lastModified": "2026-10-24T13:10:00.147", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 8.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.1, "impactScore": 4.7, "source": "secalert@redhat.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-49332", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-07-28T13:02:35.727357Z", "version": "2.0.3"}}]}, "published": "2026-07-28T13:18:46.067", "references": [{"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:50681"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:50758"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:51007"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:51013"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:51022"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:51025"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:51038"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:54188"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:54206"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:56912"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:60023"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/security/cve/CVE-2026-49332"}, {"source": "secalert@redhat.com", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2483253"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-436"}], "source": "secalert@redhat.com", "type": "Secondary"}]}

{"acknowledgement": "This issue was discovered by Jeremy Choi (Red Hat).", "bugzilla": {"description": "openshift/oauth-proxy: openshift/oauth-proxy: underscore header smuggling enables identity impersonation on WSGI/PHP upstreams", "id": "2483253", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2483253"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N", "status": "draft"}, "cwe": "CWE-436", "details": ["A flaw was found in openshift/oauth-proxy. The proxy sets authenticated identity headers using only dash-variant keys (X-Forwarded-User) but does not strip underscore-variant keys (X_Forwarded_User) from incoming requests. WSGI and PHP frameworks normalize both variants to the same variable, allowing an authenticated low-privilege user to smuggle a forged identity that may override the legitimate authenticated identity in the upstream application."], "mitigation": {"lang": "en:us", "value": "Upstream application hardening: validate X-Forwarded-User against the expected session identity. Reject requests where identity headers do not match the authenticated session."}, "name": "CVE-2026-49332", "package_state": [{"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift4/ose-oauth-proxy", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift4/ose-oauth-proxy-rhel9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-07-28T12:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-49332\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-49332"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 86.0, "confidence_source": "matching", "scores": [{"score": 86.0, "source": "matching"}]}, "original": {"product": "Red Hat OpenShift Container Platform 4", "source": "cna", "vendor": "Red Hat"}, "product": "openshift_container_platform", "vendor": "redhat"}], "created": "2026-08-03T15:15:04.083706+00:00", "updated": "2026-08-05T10:00:03.416548+00:00", "vendors": ["redhat", "redhat$PRODUCT$openshift_container_platform"]}