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TI-2026-21559 Aliases CVE-2026-27100GHSA-wfhp-qgm8-5p5c

Information disclosure in Jenkins

Priority LOW 20CWE-200Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
Low · None · None
Fix status
Partial Red Hat: 10 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-200.

Summary

Jenkins 2.550 and earlier, LTS 2.541.1 and earlier accepts Run Parameter values that refer to builds the user submitting the build does not have access to, allowing attackers with Item/Build and Item/Configure permission to obtain information about the existence of jobs, the existence of builds, and if a specified build exists, its display name.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0037 31st percentileScored 2026-11-07
Fix Partial Jenkins (Jenkins Project): 2.551, 2.541.2org.jenkins-ci.main:jenkins-core (Maven): 2.551, 2.541.2Red Hat: 10 advisoriesRed Hat: 10 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

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—2.551, 2.541.2Patch availableCNA
—org.jenkins-ci.main:jenkins-core (Maven)2.542 to before 2.5512.551Patch availableGHSA-wfhp-qgm8-5p5c
—org.jenkins-ci.main:jenkins-core (Maven)before 2.541.22.541.2Patch availableGHSA-wfhp-qgm8-5p5c
  • Jenkins VendorJenkins Affected — Fixed in 2.551, 2.541.2 Patch available CNA
  • org.jenkins-ci.main:jenkins-core (Maven) Vendor— Affected 2.542 to before 2.551 Fixed in 2.551 Patch available GHSA-wfhp-qgm8-5p5c
  • org.jenkins-ci.main:jenkins-core (Maven) Vendor— Affected before 2.541.2 Fixed in 2.541.2 Patch available GHSA-wfhp-qgm8-5p5c

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:jenkins:jenkins:*:*:*:*:lts:*:*:*before 2.541.2VulnerableJenkins
cpe:2.3:a:jenkins:jenkins:*:*:*:*:-:*:*:*before 2.551VulnerableJenkins
  • cpe:2.3:a:jenkins:jenkins:*:*:*:*:lts:*:*:* Versions before 2.541.2 Vulnerable ·Jenkins
  • cpe:2.3:a:jenkins:jenkins:*:*:*:*:-:*:*:* Versions before 2.551 Vulnerable ·Jenkins

Remediation

  • Fix · CNA Jenkins (Jenkins Project) Fixed in 2.551, 2.541.2
  • Fix · GHSA-wfhp-qgm8-5p5c org.jenkins-ci.main:jenkins-core (Maven) Fixed in 2.551 Advisory →
  • Fix · GHSA-wfhp-qgm8-5p5c org.jenkins-ci.main:jenkins-core (Maven) Fixed in 2.541.2 Advisory →

Red Hat 10 advisories

  • RHSA-2026:10214 Released 2026-04-23 · 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-2026:10215 Released 2026-04-23 · 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-2026:10213 Released 2026-04-23 · 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
Show 7 more Red Hat advisories
  • RHSA-2026:10211 Released 2026-04-23 · 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-2026:10209 Released 2026-04-23 · 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-2026:10206 Released 2026-04-23 · 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-2026:10205 Released 2026-04-23 · 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-2026:10204 Released 2026-04-23 · 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
  • RHSA-2026:10201 Released 2026-04-23 · 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-2026:10199 Released 2026-04-23 · 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

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    Jenkins — Jenkins Security Advisory 2026-02-18

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    Show all 2 records → Advisory →

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
OpenShift Developer Tools and ServicesAffectedNo fix yet: Fix deferred
OpenShift Developer Tools and Services 4.12Fixed RHSA-2026:10209
OpenShift Developer Tools and Services 4.13Fixed RHSA-2026:10201
OpenShift Developer Tools and Services 4.14Fixed RHSA-2026:10211
OpenShift Developer Tools and Services 4.15Fixed RHSA-2026:10204
OpenShift Developer Tools and Services 4.16Fixed RHSA-2026:10214
OpenShift Developer Tools and Services 4.17Fixed RHSA-2026:10213
OpenShift Developer Tools and Services 4.18Fixed RHSA-2026:10215
OpenShift Developer Tools and Services 4.19Fixed RHSA-2026:10206
OpenShift Developer Tools and Services 4.20Fixed RHSA-2026:10205
OpenShift Developer Tools and Services 4.21Fixed RHSA-2026:10199
Not affected: 10 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

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-27100
  2. 2026-10-03 Alias added: GHSA-wfhp-qgm8-5p5c

References

Advisory 2

Other 4

  • 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