CVE-2026-84649

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-84649", "assignerOrgId": "39769cd5-e6e2-4dc8-927e-97b3aa056f5b", "state": "PUBLISHED", "assignerShortName": "jenkins", "dateReserved": "2026-09-01T21:55:27.033Z", "datePublished": "2026-09-02T15:40:41.876Z", "dateUpdated": "2026-09-17T19:06:19.098Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "affected", "product": "Jenkins", "vendor": "Jenkins Project", "versions": [{"lessThan": "*", "status": "unaffected", "version": "2.580", "versionType": "maven"}, {"lessThan": "2.447", "status": "unaffected", "version": "0", "versionType": "maven"}, {"lessThan": "2.568.*", "status": "unaffected", "version": "2.568.3", "versionType": "maven"}]}], "descriptions": [{"lang": "en", "value": "In Stapler 1839.ved17667b_a_eb_5 through 2107.v8dfcb_e8ed317 (both inclusive), except 2088.2093.vd7c3e58008a_6, included in Jenkins 2.447 through 2.579 (both inclusive), LTS 2.452.1 through 2.568.2 (both inclusive), an HTTP endpoint serving dynamically generated JavaScript resources embeds the user's cross-site request forgery (CSRF) token (crumb) as a string literal, allowing attackers with control over a page hosted on the same site as Jenkins to obtain a valid crumb for the targeted user's session and perform actions on their behalf."}], "providerMetadata": {"orgId": "39769cd5-e6e2-4dc8-927e-97b3aa056f5b", "shortName": "jenkins", "dateUpdated": "2026-09-02T16:00:58.760Z"}, "references": [{"name": "Jenkins Security Advisory 2026-09-02", "tags": ["vendor-advisory"], "url": "https://www.jenkins.io/security/advisory/2026-09-02/#SECURITY-3878"}]}, "adp": [{"problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-352", "lang": "en", "description": "CWE-352 Cross-Site Request Forgery (CSRF)"}]}], "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-09-02T17:38:27.819685Z", "id": "CVE-2026-84649", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-17T19:06:19.098Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2026-84649", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-09-02T17:38:27.819685Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-352", "description": "CWE-352 Cross-Site Request Forgery (CSRF)"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-02T17:38:24.411Z"}}], "cna": {"affected": [{"vendor": "Jenkins Project", "product": "Jenkins", "versions": [{"status": "unaffected", "version": "2.580", "lessThan": "*", "versionType": "maven"}, {"status": "unaffected", "version": "0", "lessThan": "2.447", "versionType": "maven"}, {"status": "unaffected", "version": "2.568.3", "lessThan": "2.568.*", "versionType": "maven"}], "defaultStatus": "affected"}], "references": [{"url": "https://www.jenkins.io/security/advisory/2026-09-02/#SECURITY-3878", "name": "Jenkins Security Advisory 2026-09-02", "tags": ["vendor-advisory"]}], "descriptions": [{"lang": "en", "value": "In Stapler 1839.ved17667b_a_eb_5 through 2107.v8dfcb_e8ed317 (both inclusive), except 2088.2093.vd7c3e58008a_6, included in Jenkins 2.447 through 2.579 (both inclusive), LTS 2.452.1 through 2.568.2 (both inclusive), an HTTP endpoint serving dynamically generated JavaScript resources embeds the user's cross-site request forgery (CSRF) token (crumb) as a string literal, allowing attackers with control over a page hosted on the same site as Jenkins to obtain a valid crumb for the targeted user's session and perform actions on their behalf."}], "providerMetadata": {"orgId": "39769cd5-e6e2-4dc8-927e-97b3aa056f5b", "shortName": "jenkins", "dateUpdated": "2026-09-02T16:00:58.760Z"}}}, "cveMetadata": {"cveId": "CVE-2026-84649", "state": "PUBLISHED", "dateUpdated": "2026-09-17T19:06:19.098Z", "dateReserved": "2026-09-01T21:55:27.033Z", "assignerOrgId": "39769cd5-e6e2-4dc8-927e-97b3aa056f5b", "datePublished": "2026-09-02T15:40:41.876Z", "assignerShortName": "jenkins"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "affected", "product": "Jenkins", "vendor": "Jenkins Project", "versions": [{"lessThan": "*", "status": "unaffected", "version": "2.580", "versionType": "maven"}, {"lessThan": "2.447", "status": "unaffected", "version": "0", "versionType": "maven"}, {"lessThan": "2.568.*", "status": "unaffected", "version": "2.568.3", "versionType": "maven"}]}], "source": "jenkinsci-cert@googlegroups.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In Stapler 1839.ved17667b_a_eb_5 through 2107.v8dfcb_e8ed317 (both inclusive), except 2088.2093.vd7c3e58008a_6, included in Jenkins 2.447 through 2.579 (both inclusive), LTS 2.452.1 through 2.568.2 (both inclusive), an HTTP endpoint serving dynamically generated JavaScript resources embeds the user's cross-site request forgery (CSRF) token (crumb) as a string literal, allowing attackers with control over a page hosted on the same site as Jenkins to obtain a valid crumb for the targeted user's session and perform actions on their behalf."}], "id": "CVE-2026-84649", "lastModified": "2026-09-03T17:13:16.490", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-84649", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-09-02T17:38:27.819685Z", "version": "2.0.3"}}]}, "published": "2026-09-02T16:17:29.620", "references": [{"source": "jenkinsci-cert@googlegroups.com", "url": "https://www.jenkins.io/security/advisory/2026-09-02/#SECURITY-3878"}], "sourceIdentifier": "jenkinsci-cert@googlegroups.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-352"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "jenkins: stapler: Stapler: Cross-site request forgery token disclosure allows session hijacking", "id": "2527605", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2527605"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.1", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N", "status": "draft"}, "cwe": "CWE-201", "details": ["In Stapler 1839.ved17667b_a_eb_5 through 2107.v8dfcb_e8ed317 (both inclusive), except 2088.2093.vd7c3e58008a_6, included in Jenkins 2.447 through 2.579 (both inclusive), LTS 2.452.1 through 2.568.2 (both inclusive), an HTTP endpoint serving dynamically generated JavaScript resources embeds the user's cross-site request forgery (CSRF) token (crumb) as a string literal, allowing attackers with control over a page hosted on the same site as Jenkins to obtain a valid crumb for the targeted user's session and perform actions on their behalf.", "A flaw was found in Stapler, a web framework used by Jenkins. An HTTP endpoint that serves dynamically generated JavaScript resources inadvertently embeds a user's cross-site request forgery (CSRF) token, also known as a crumb, as plain text. This allows a remote attacker, who controls a web page on the same site as Jenkins, to obtain a valid crumb for a targeted user's session. Consequently, the attacker can perform unauthorized actions on behalf of the user, leading to session hijacking."], "mitigation": {"lang": "en:us", "value": "To mitigate this issue, administrators should disable the Resource Root URL feature in Jenkins or configure it to use a different domain than the main Jenkins instance. This prevents an attacker from loading dynamically generated JavaScript resources containing the CSRF token from a co-hosted page."}, "name": "CVE-2026-84649", "package_state": [{"cpe": "cpe:/a:redhat:ocp_tools", "fix_state": "Affected", "package_name": "jenkins", "product_name": "OpenShift Developer Tools and Services"}, {"cpe": "cpe:/a:redhat:ocp_tools", "fix_state": "Affected", "package_name": "ocp-tools-4/jenkins-rhel8", "product_name": "OpenShift Developer Tools and Services"}, {"cpe": "cpe:/a:redhat:ocp_tools", "fix_state": "Affected", "package_name": "ocp-tools-4/jenkins-rhel9", "product_name": "OpenShift Developer Tools and Services"}], "public_date": "2026-09-02T15:40:41Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-84649\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-84649\nhttps://www.jenkins.io/security/advisory/2026-09-02/#SECURITY-3878"], "statement": "This Important vulnerability in Stapler, as used in Jenkins, allows an attacker to perform session hijacking. By controlling a web page on the same site as Jenkins, an attacker can hijack a user's token through cross-site request forgery (CSRF), enabling unauthorized actions. This risk is elevated when the Resource Root URL is configured on the same domain as the Jenkins URL.", "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[2.580,*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,2.447)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[2.568.3,2.569.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Jenkins", "source": "cna", "vendor": "Jenkins Project"}, "product": "jenkins", "vendor": "jenkins_project"}], "created": "2026-09-03T10:45:04.879540+00:00", "updated": "2026-09-04T02:00:05.664686+00:00", "vendors": ["jenkins_project", "jenkins_project$PRODUCT$jenkins"]}