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TI-2021-04766 Aliases CVE-2021-21686GHSA-4g38-hrm4-rg94

Link following in Jenkins

Priority LOW 39CWE-59Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA, GitHub and Red Hat.

Summary

File path filters in the agent-to-controller security subsystem of Jenkins 2.318 and earlier, LTS 2.303.2 and earlier do not canonicalize paths, allowing operations to follow symbolic links to outside allowed directories.

Why it matters now

EPSS 0.01983 80th percentileScored 2026-11-07
Fix Fixed org.jenkins-ci.main:jenkins-core (Maven): 2.303.3, 2.319Red Hat: 6 advisories

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
JenkinsJenkinsup to 2.318; up to LTS 2.303.2—No fix listedCNA
—org.jenkins-ci.main:jenkins-core (Maven)before 2.303.32.303.3Patch availableGHSA-4g38-hrm4-rg94
—org.jenkins-ci.main:jenkins-core (Maven)2.304 to before 2.3192.319Patch availableGHSA-4g38-hrm4-rg94
  • Jenkins VendorJenkins Affected up to 2.318; up to LTS 2.303.2 Fixed in — No fix listed CNA
  • org.jenkins-ci.main:jenkins-core (Maven) Vendor— Affected before 2.303.3 Fixed in 2.303.3 Patch available GHSA-4g38-hrm4-rg94
  • org.jenkins-ci.main:jenkins-core (Maven) Vendor— Affected 2.304 to before 2.319 Fixed in 2.319 Patch available GHSA-4g38-hrm4-rg94

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:jenkins:jenkins:*:*:*:*:lts:*:*:*before 2.303.3VulnerableJenkins
cpe:2.3:a:jenkins:jenkins:*:*:*:*:-:*:*:*before 2.319VulnerableJenkins
  • cpe:2.3:a:jenkins:jenkins:*:*:*:*:lts:*:*:* Versions before 2.303.3 Vulnerable ·Jenkins
  • cpe:2.3:a:jenkins:jenkins:*:*:*:*:-:*:*:* Versions before 2.319 Vulnerable ·Jenkins

Remediation

  • Fix · GHSA-4g38-hrm4-rg94 org.jenkins-ci.main:jenkins-core (Maven) Fixed in 2.303.3 Advisory →
  • Fix · GHSA-4g38-hrm4-rg94 org.jenkins-ci.main:jenkins-core (Maven) Fixed in 2.319 Advisory →

Red Hat 6 advisories

  • RHSA-2022:0055 Released 2022-03-10 · Red Hat rating Moderate
    OpenShift Container Platform 4.10.3 bug fix and security update
    • Red Hat OpenShift Container Platform 4.10 coreos-installer-0.12.0-1.rhaos4.10.el8, coreos-installer-bootinfra-0.12.0-1.rhaos4.10.el8, cri-o-1.23.0-92.rhaos4.10.gitdaab4d1.el7 +11
  • RHSA-2021:4827 Released 2021-12-02 · Red Hat rating Important
    OpenShift Container Platform 3.11.569 security update
    • Red Hat OpenShift Container Platform 3.11 jenkins-2-plugins-3.11.1637699107-1.el7, jenkins-2.303.3.1637698110-1.el7
  • RHSA-2021:4799 Released 2021-12-02 · Red Hat rating Important
    OpenShift Container Platform 4.6.51 packages and security update
    • Red Hat OpenShift Container Platform 4.6 jenkins-2-plugins-4.6.1637602169-1.el8, jenkins-2.303.3.1637597493-1.el8
Show 3 more Red Hat advisories
  • RHSA-2021:4801 Released 2021-12-01 · Red Hat rating Important
    OpenShift Container Platform 4.7.38 security update
    • Red Hat OpenShift Container Platform 4.7 jenkins-2-plugins-4.7.1637600997-1.el8, jenkins-2.303.3.1637597018-1.el8
  • RHSA-2021:4829 Released 2021-11-30 · Red Hat rating Important
    OpenShift Container Platform 4.8.22 security update
    • Red Hat OpenShift Container Platform 4.8 coreos-installer-0.9.0-8.rhaos4.8.el8, jenkins-2-plugins-4.8.1637599935-1.el8, jenkins-2.303.3.1637596565-1.el8
  • RHSA-2021:4833 Released 2021-11-29 · Red Hat rating Important
    OpenShift Container Platform 4.9.9 security update
    • Red Hat OpenShift Container Platform 4.9 jenkins-2-plugins-4.9.1637598812-1.el8, jenkins-2.303.3.1637595827-1.el8

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat OpenShift Container Platform 3.11Fixed RHSA-2021:4827
Red Hat OpenShift Container Platform 4.10Fixed RHSA-2022:0055
Red Hat OpenShift Container Platform 4.6Fixed RHSA-2021:4799
Red Hat OpenShift Container Platform 4.7Fixed RHSA-2021:4801
Red Hat OpenShift Container Platform 4.8Fixed RHSA-2021:4829
Red Hat OpenShift Container Platform 4.9Fixed RHSA-2021:4833
Not affected: 7 products
  • Red Hat Fuse 7
  • Red Hat OpenShift Container Platform 3.11
  • Red Hat OpenShift Container Platform 4.10
  • Red Hat OpenShift Container Platform 4.6
  • Red Hat OpenShift Container Platform 4.7
  • Red Hat OpenShift Container Platform 4.8
  • Red Hat OpenShift Container Platform 4.9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-21686
  2. 2026-10-03 Alias added: GHSA-4g38-hrm4-rg94

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