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TI-2026-38517 Aliases CVE-2026-53435GHSA-g2xq-2v27-4rh3

Deserialization of untrusted data in Jenkins

Priority HIGH 72CWE-502Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
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, GitHub and Red Hat. Impact type from CWE-502.

Summary

In Jenkins 2.567 and earlier, LTS 2.555.2 and earlier, it is possible for attackers to have Jenkins deserialize arbitrary types defined in Jenkins core or plugins from an attacker-controlled `config.xml` submission in a way that allows them to handle HTTP requests afterwards. This can be used to impersonate any user and send HTTP requests on their behalf, up to and including use of the Script Console to run arbitrary code, or to read arbitrary files from the Jenkins controller.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.51171 98th percentileScored 2026-11-07
Fix Partial Jenkins (Jenkins Project): 2.568, 2.555.3org.jenkins-ci.main:jenkins-core (Maven): 2.555.3, 2.568Red Hat: 11 advisoriesRed Hat: 11 fixed, 1 without a fix

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

VendorProductAffected versionsFixed inStatusSource
JenkinsJenkins—2.568, 2.555.3Patch availableCNA
—org.jenkins-ci.main:jenkins-core (Maven)before 2.555.32.555.3Patch availableGHSA-g2xq-2v27-4rh3
—org.jenkins-ci.main:jenkins-core (Maven)2.556 to before 2.5682.568Patch availableGHSA-g2xq-2v27-4rh3
  • Jenkins VendorJenkins Affected — Fixed in 2.568, 2.555.3 Patch available CNA
  • org.jenkins-ci.main:jenkins-core (Maven) Vendor— Affected before 2.555.3 Fixed in 2.555.3 Patch available GHSA-g2xq-2v27-4rh3
  • org.jenkins-ci.main:jenkins-core (Maven) Vendor— Affected 2.556 to before 2.568 Fixed in 2.568 Patch available GHSA-g2xq-2v27-4rh3

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:jenkins:jenkins:*:*:*:*:lts:*:*:*before 2.555.3VulnerableJenkins
cpe:2.3:a:jenkins:jenkins:*:*:*:*:-:*:*:*before 2.568VulnerableJenkins
  • cpe:2.3:a:jenkins:jenkins:*:*:*:*:lts:*:*:* Versions before 2.555.3 Vulnerable ·Jenkins
  • cpe:2.3:a:jenkins:jenkins:*:*:*:*:-:*:*:* Versions before 2.568 Vulnerable ·Jenkins

Remediation

  • Fix · CNA Jenkins (Jenkins Project) Fixed in 2.568, 2.555.3
  • Fix · GHSA-g2xq-2v27-4rh3 org.jenkins-ci.main:jenkins-core (Maven) Fixed in 2.555.3 Advisory →
  • Fix · GHSA-g2xq-2v27-4rh3 org.jenkins-ci.main:jenkins-core (Maven) Fixed in 2.568 Advisory →

Red Hat 11 advisories

  • RHSA-2026:60259 Released 2026-08-26 · Red Hat rating Important
    Release 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
  • RHSA-2026:60256 Released 2026-08-26 · Red Hat rating Important
    Release 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-2026:60254 Released 2026-08-26 · Red Hat rating Important
    Release 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
Show 8 more Red Hat advisories
  • RHSA-2026:60252 Released 2026-08-26 · Red Hat rating Important
    Release 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-2026:60251 Released 2026-08-26 · Red Hat rating Important
    Release 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-2026:60250 Released 2026-08-26 · Red Hat rating Important
    Release 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-2026:60249 Released 2026-08-26 · Red Hat rating Important
    Release 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-2026:60248 Released 2026-08-26 · Red Hat rating Important
    Release 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-2026:60247 Released 2026-08-26 · Red Hat rating Important
    Release 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-2026:60246 Released 2026-08-26 · Red Hat rating Important
    Release 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-2026:60239 Released 2026-08-26 · Red Hat rating Important
    Release 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 2026-06-10

    8 records Highest priority Priority HIGH 1 HIGH, 7 LOW

    Other records, highest priority first

    • TI-2026-38523 Cross-site scripting in JenkinsPriority LOW 24
    • TI-2026-38524 Jenkins 2.567 and earlier, LTS 2.555.2 and earlier does not encrypt secrets from POST…Priority LOW 23
    • TI-2026-38519 Open redirect in JenkinsPriority LOW 20
    Show all 8 records → Advisory →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
OpenShift Developer Tools and ServicesAffectedNo fix yet
OpenShift Developer Tools and Services 4.12Fixed RHSA-2026:60247
OpenShift Developer Tools and Services 4.13Fixed RHSA-2026:60249
OpenShift Developer Tools and Services 4.14Fixed RHSA-2026:60248
OpenShift Developer Tools and Services 4.15Fixed RHSA-2026:60239
OpenShift Developer Tools and Services 4.16Fixed RHSA-2026:60251
OpenShift Developer Tools and Services 4.17Fixed RHSA-2026:60246
OpenShift Developer Tools and Services 4.18Fixed RHSA-2026:60250
OpenShift Developer Tools and Services 4.19Fixed RHSA-2026:60252
OpenShift Developer Tools and Services 4.20Fixed RHSA-2026:60259
OpenShift Developer Tools and Services 4.21Fixed RHSA-2026:60254
OpenShift Developer Tools and Services 4.22Fixed RHSA-2026:60256
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

  1. 2026-10-02 Threatist record created from CVE-2026-53435
  2. 2026-10-03 Alias added: GHSA-g2xq-2v27-4rh3
  3. 2026-10-15 Affected versions changed · Red Hat
  4. 2026-10-25 EPSS moved to the 95th–99th percentile
  5. 2026-10-25 Priority changed: MEDIUM → HIGH

References

Advisory 2

Other 17

  • TI-2024-15885 Path traversal in Jenkins KEVCVSS 3.1CRITICAL 9.8
  • 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
  • TI-2015-04472 The Fingerprints pages in Jenkins before 1.638 and LTS before 1.625.2 might allow remote… KEVCVSS 3.1HIGH 7.5
  • TI-2016-07596 The remoting module in Jenkins before 2.32 and LTS before 2.19.3 allows remote attackers… CVSS 3.0CRITICAL 9.8
See all 293 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences