Cross-site request forgery in Jenkins
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Tampering
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 11 fixed, 1 without a fix
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-352.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
- Fix · CNA Jenkins (Jenkins Project) Fixed in 2.580, 2.568.3
Red Hat 11 advisories
- RHSA-2026:88159 Released 2026-10-22 · Red Hat rating CriticalRelease of Red Hat OpenShift Developer Tools - Openshift Jenkins 4.17 security update.
- OpenShift Developer Tools and Services 4.17 registry.redhat.io/ocp-tools-4/jenkins-rhel9
- RHSA-2026:88158 Released 2026-10-22 · Red Hat rating CriticalRelease of Red Hat OpenShift Developer Tools - Openshift Jenkins 4.19 security update.
- OpenShift Developer Tools and Services 4.19 registry.redhat.io/ocp-tools-4/jenkins-rhel9
- RHSA-2026:88157 Released 2026-10-22 · Red Hat rating CriticalRelease of Red Hat OpenShift Developer Tools - Openshift Jenkins 4.20 security update.
- OpenShift Developer Tools and Services 4.20 registry.redhat.io/ocp-tools-4/jenkins-rhel9
Show 8 more Red Hat advisories
- RHSA-2026:88156 Released 2026-10-22 · Red Hat rating CriticalRelease of Red Hat OpenShift Developer Tools - Openshift Jenkins 4.16 security update.
- OpenShift Developer Tools and Services 4.16 registry.redhat.io/ocp-tools-4/jenkins-rhel9
- RHSA-2026:88155 Released 2026-10-22 · Red Hat rating CriticalRelease of Red Hat OpenShift Developer Tools - Openshift Jenkins 4.21 security update.
- OpenShift Developer Tools and Services 4.21 registry.redhat.io/ocp-tools-4/jenkins-rhel9
- RHSA-2026:88154 Released 2026-10-22 · Red Hat rating CriticalRelease of Red Hat OpenShift Developer Tools - Openshift Jenkins 4.22 security update.
- OpenShift Developer Tools and Services 4.22 registry.redhat.io/ocp-tools-4/jenkins-rhel9
- RHSA-2026:88153 Released 2026-10-22 · Red Hat rating CriticalRelease of Red Hat OpenShift Developer Tools - Openshift Jenkins 4.18 security update.
- OpenShift Developer Tools and Services 4.18 registry.redhat.io/ocp-tools-4/jenkins-rhel9
- RHSA-2026:88151 Released 2026-10-22 · Red Hat rating CriticalRelease of Red Hat OpenShift Developer Tools - Openshift Jenkins 4.14 security update.
- OpenShift Developer Tools and Services 4.14 registry.redhat.io/ocp-tools-4/jenkins-rhel8
- RHSA-2026:88152 Released 2026-10-22 · Red Hat rating CriticalRelease of Red Hat OpenShift Developer Tools - Openshift Jenkins 4.12 security update.
- OpenShift Developer Tools and Services 4.12 registry.redhat.io/ocp-tools-4/jenkins-rhel8
- RHSA-2026:88149 Released 2026-10-22 · Red Hat rating CriticalRelease of Red Hat OpenShift Developer Tools - Openshift Jenkins 4.13 security update.
- OpenShift Developer Tools and Services 4.13 registry.redhat.io/ocp-tools-4/jenkins-rhel8
- RHSA-2026:88150 Released 2026-10-22 · Red Hat rating CriticalRelease of Red Hat OpenShift Developer Tools - Openshift Jenkins 4.15 security update.
- OpenShift Developer Tools and Services 4.15 registry.redhat.io/ocp-tools-4/jenkins-rhel8
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Advisory ·
Jenkins — Jenkins Security Advisory 2026-09-02
13 records Highest priority Priority MEDIUM 4 MEDIUM, 9 LOW
Other records, highest priority first
- TI-2026-58188 Cross-site scripting in JenkinsPriority MEDIUM 41
- TI-2026-58187 Deserialization of untrusted data in JenkinsPriority MEDIUM 41
- TI-2026-58185 Mass assignment in JenkinsPriority MEDIUM 41
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| OpenShift Developer Tools and Services | Affected | No fix yet |
| OpenShift Developer Tools and Services 4.12 | Fixed | RHSA-2026:88152 |
| OpenShift Developer Tools and Services 4.13 | Fixed | RHSA-2026:88149 |
| OpenShift Developer Tools and Services 4.14 | Fixed | RHSA-2026:88151 |
| OpenShift Developer Tools and Services 4.15 | Fixed | RHSA-2026:88150 |
| OpenShift Developer Tools and Services 4.16 | Fixed | RHSA-2026:88156 |
| OpenShift Developer Tools and Services 4.17 | Fixed | RHSA-2026:88159 |
| OpenShift Developer Tools and Services 4.18 | Fixed | RHSA-2026:88153 |
| OpenShift Developer Tools and Services 4.19 | Fixed | RHSA-2026:88158 |
| OpenShift Developer Tools and Services 4.20 | Fixed | RHSA-2026:88157 |
| OpenShift Developer Tools and Services 4.21 | Fixed | RHSA-2026:88155 |
| OpenShift Developer Tools and Services 4.22 | Fixed | RHSA-2026:88154 |
Not affected: 11 products
- OpenShift Developer Tools and Services 4.12
- OpenShift Developer Tools and Services 4.13
- OpenShift Developer Tools and Services 4.14
- OpenShift Developer Tools and Services 4.15
- OpenShift Developer Tools and Services 4.16
- OpenShift Developer Tools and Services 4.17
- OpenShift Developer Tools and Services 4.18
- OpenShift Developer Tools and Services 4.19
- OpenShift Developer Tools and Services 4.20
- OpenShift Developer Tools and Services 4.21
- OpenShift Developer Tools and Services 4.22
Timeline
- 2026-10-02 Threatist record created from CVE-2026-84649
- 2026-10-03 Alias added: GHSA-hxvq-fvg2-gh6m
- 2026-10-23 Fix available: RHSA-2026:88149 · Red Hat
- 2026-10-23 Fix available: RHSA-2026:88152 · Red Hat
- 2026-10-23 Fix available: RHSA-2026:88150 · Red Hat
- 2026-10-23 Fix available: RHSA-2026:88156 · Red Hat
- 2026-10-23 Fix available: RHSA-2026:88153 · Red Hat
- 2026-10-23 Fix available: RHSA-2026:88154 · Red Hat
- 2026-10-23 Fix available: RHSA-2026:88157 · Red Hat
- 2026-10-23 Fix available: RHSA-2026:88155 · Red Hat
- 2026-10-23 Fix available: RHSA-2026:88151 · Red Hat
- 2026-10-23 Fix available: RHSA-2026:88158 · Red Hat
- 2026-10-23 Fix available: RHSA-2026:88159 · Red Hat
- 2026-10-23 Fix available: OpenShift Developer Tools and Services 4.12, OpenShift Developer Tools and Services 4.13, OpenShift Developer Tools and Services 4.14 +8 · Red Hat
References
Advisory 1
More Jenkins vulnerabilities
- TI-2024-15885 Path traversal in Jenkins KEVCVSS 3.1CRITICAL 9.8
- TI-2019-15875 Protection mechanism failure in Jenkins Pipeline: Groovy Plugin KEVCVSS 3.1CRITICAL 9.9
- TI-2019-15874 Protection mechanism failure in Jenkins Script Security Plugin KEVCVSS 3.1CRITICAL 9.9
- TI-2018-16080 A code execution vulnerability exists in the Stapler web framework used by Jenkins 2.153… KEVCVSS 3.1CRITICAL 9.8
- TI-2017-14573 Jenkins versions 2.56 and earlier as well as 2.46.1 LTS and earlier are vulnerable to an… KEVCVSS 3.1CRITICAL 9.8
- TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
Sources
- CVE-2026-84649 · CVE Program
- CVE-2026-84649 · NVD
- FIRST EPSS
- GHSA-hxvq-fvg2-gh6m · GitHub Advisory Database · CC BY 4.0
- CVE-2026-84649 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences