CVE-2026-88059

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Applications can mitigate by attaching credentials at the child, filtering sensitive endpoints with withHttpTransferCacheOptions, disabling transfer caching for sensitive routes, or marking personalized HTML private or no-store. This issue is fixed in versions 20.3.28, 21.2.20, and 22.1.1."}], "source": {"advisory": "GHSA-p297-fm68-3q8c", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-09-11T17:49:17.182667Z", "id": "CVE-2026-88059", "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": "2026-09-11T17:50:22.562Z"}}]}}

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Prior to 20.3.28, 21.2.20, and 22.1.1, Angular's @angular/common HttpTransferCache can cache an authenticated response when Server-Side Rendering (SSR) and hydration use a hierarchical HttpClient configured with withRequestsMadeViaParent. The child TransferCache evaluates an initially anonymous request before delegation, then a parent withInterceptors chain adds an Authorization header, cookie, or API token; although the parent cache skips the authenticated request, the child still stores the private response in TransferState serialized as JSON in the ng-state script. Exploitation requires provideClientHydration, child provideHttpClient delegation through withRequestsMadeViaParent, parent-level credential injection, and an SSR HTML response shared across users by a CDN, reverse proxy, or application cache. A later unauthenticated or unauthorized visitor can receive the cached HTML containing the earlier authenticated user's sensitive response data. Applications can mitigate by attaching credentials at the child, filtering sensitive endpoints with withHttpTransferCacheOptions, disabling transfer caching for sensitive routes, or marking personalized HTML private or no-store. This issue is fixed in versions 20.3.28, 21.2.20, and 22.1.1."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-200", "description": "CWE-200: Exposure of Sensitive Information to an Unauthorized Actor"}]}, {"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-524", "description": "CWE-524: Use of Cache Containing Sensitive Information"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-10T19:00:12.376Z"}}}, "cveMetadata": {"cveId": "CVE-2026-88059", "state": "PUBLISHED", "dateUpdated": "2026-09-11T17:50:22.562Z", "dateReserved": "2026-09-09T21:22:45.434Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-09-10T19:00:12.376Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

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Prior to 20.3.28, 21.2.20, and 22.1.1, Angular's @angular/common HttpTransferCache can cache an authenticated response when Server-Side Rendering (SSR) and hydration use a hierarchical HttpClient configured with withRequestsMadeViaParent. The child TransferCache evaluates an initially anonymous request before delegation, then a parent withInterceptors chain adds an Authorization header, cookie, or API token; although the parent cache skips the authenticated request, the child still stores the private response in TransferState serialized as JSON in the ng-state script. Exploitation requires provideClientHydration, child provideHttpClient delegation through withRequestsMadeViaParent, parent-level credential injection, and an SSR HTML response shared across users by a CDN, reverse proxy, or application cache. A later unauthenticated or unauthorized visitor can receive the cached HTML containing the earlier authenticated user's sensitive response data. Applications can mitigate by attaching credentials at the child, filtering sensitive endpoints with withHttpTransferCacheOptions, disabling transfer caching for sensitive routes, or marking personalized HTML private or no-store. This issue is fixed in versions 20.3.28, 21.2.20, and 22.1.1."}], "id": "CVE-2026-88059", "lastModified": "2026-09-29T21:09:15.133", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.0, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 1.4, "source": "security-advisories@github.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-88059", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-09-11T17:49:17.182667Z", "version": "2.0.3"}}]}, "published": "2026-09-10T19:17:41.950", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/angular/angular/commit/c45028e44f5f3c1e0006eaccf86642deca51b2af"}, {"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/angular/angular/commit/caf616670fd20d528aa69e0131cc17d60f0cc27d"}, {"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/angular/angular/commit/e4c416c20a1cb222ce73d29c035452b257380c56"}, {"source": "security-advisories@github.com", "tags": ["Issue Tracking", "Patch"], "url": "https://github.com/angular/angular/issues/69777"}, {"source": "security-advisories@github.com", "tags": ["Issue Tracking", "Patch"], "url": "https://github.com/angular/angular/pull/69778"}, {"source": "security-advisories@github.com", "tags": ["Release Notes"], "url": "https://github.com/angular/angular/releases/tag/v20.3.28"}, {"source": "security-advisories@github.com", "tags": ["Release Notes"], "url": "https://github.com/angular/angular/releases/tag/v21.2.20"}, {"source": "security-advisories@github.com", "tags": ["Release Notes"], "url": "https://github.com/angular/angular/releases/tag/v22.1.1"}, {"source": "security-advisories@github.com", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "url": "https://github.com/angular/angular/security/advisories/GHSA-p297-fm68-3q8c"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-200"}, {"lang": "en", "value": "CWE-524"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "Angular: Angular: Information Leak via HttpTransferCache Bypass", "id": "2531610", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2531610"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.0", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N", "status": "draft"}, "cwe": "CWE-524", "details": ["A flaw was found in Angular. When Server-Side Rendering (SSR) and hydration are used with a hierarchical HttpClient configured with `withRequestsMadeViaParent`, the `HttpTransferCache` can improperly cache authenticated responses. This occurs because a child TransferCache stores private response data in TransferState even when a parent HttpClient chain adds credentials and skips the authenticated request. Consequently, a later unauthenticated or unauthorized visitor could receive cached HTML containing sensitive data from a previously authenticated user, leading to information disclosure."], "name": "CVE-2026-88059", "package_state": [{"cpe": "cpe:/a:redhat:amq_interconnect:1", "fix_state": "Out of support scope", "package_name": "qpid-dispatch", "product_name": "A-MQ Interconnect 1"}, {"cpe": "cpe:/a:redhat:ceph_storage:4", "fix_state": "Out of support scope", "package_name": "rhceph/rhceph-4-dashboard-rhel8", "product_name": "Red Hat Ceph Storage 4"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "gjs", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "grafana", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "grafana", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "mozjs60", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "grafana", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:jboss_fuse:7", "fix_state": "Out of support scope", "package_name": "angular", "product_name": "Red Hat Fuse 7"}, {"cpe": "cpe:/a:redhat:openstack:16.2", "fix_state": "Out of support scope", "package_name": "qpid-dispatch", "product_name": "Red Hat OpenStack Platform 16.2"}, {"cpe": "cpe:/a:redhat:quay:3", "fix_state": "Out of support scope", "package_name": "quay/quay-rhel8", "product_name": "Red Hat Quay 3"}, {"cpe": "cpe:/a:redhat:quay:3", "fix_state": "Fix deferred", "package_name": "quay/quay-rhel9", "product_name": "Red Hat Quay 3"}, {"cpe": "cpe:/a:redhat:red_hat_single_sign_on:7", "fix_state": "Out of support scope", "package_name": "rh-sso-server-dist.zip", "product_name": "Red Hat Single Sign-On 7"}], "public_date": "2026-09-10T19:00:12Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-88059\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-88059\nhttps://github.com/angular/angular/commit/c45028e44f5f3c1e0006eaccf86642deca51b2af\nhttps://github.com/angular/angular/commit/caf616670fd20d528aa69e0131cc17d60f0cc27d\nhttps://github.com/angular/angular/commit/e4c416c20a1cb222ce73d29c035452b257380c56\nhttps://github.com/angular/angular/issues/69777\nhttps://github.com/angular/angular/pull/69778\nhttps://github.com/angular/angular/releases/tag/v20.3.28\nhttps://github.com/angular/angular/releases/tag/v21.2.20\nhttps://github.com/angular/angular/releases/tag/v22.1.1\nhttps://github.com/angular/angular/security/advisories/GHSA-p297-fm68-3q8c"], "threat_severity": "Moderate"}

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