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Medium

Time-of-check Time-of-use (TOCTOU) Race Condition in Jenkins

  • Disclosed: 24.05.2022
  • Updated: 11.10.2026 11:21

Due to a time-of-check to time-of-use (TOCTOU) race condition, the file browser for workspaces, archived artifacts, and $JENKINS_HOME/userContent/ follows symbolic links to locations outside the directory being browsed in Jenkins 2.275 and LTS 2.263.2.

This allows attackers with Job/Workspace permission and the ability to control workspace contents, e.g., with Job/Configure permission or the ability to change SCM contents, to create symbolic links that allow them to access files outside workspaces using the workspace browser.

This issue is caused by an incorrectly applied fix for SECURITY-1452 / CVE-2021-21602 in the 2021-01-13 security advisory.

Jenkins 2.276, LTS 2.263.3 no longer differentiates the check and the use of symlinks in workspace browsers.

Affected software

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
Java / Kotlin (Maven) org.jenkins-ci.main:jenkins-core < 2.263.3, >= 2.264, < 2.276 2.263.3, 2.276

References

CVSS score 5.3/10
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness (CWE)
CWE-367
Platform
Java / Kotlin (Maven)
Package
org.jenkins-ci.main:jenkins-core
Disclosed
24.05.2022
Updated
11.10.2026 11:21

Sources and licenses

OSV / GitHub Advisory Database - GHSA-qxp6-27gw-99cj - CC BY 4.0

Vulnerability history: org.jenkins-ci.main:jenkins-core

All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.

All (259) in the archive
Total entries
259
First → latest
01.2022 06.2026
Without a fix
1
Exploited in attacks
4

Severity breakdown

  • Critical 19
  • High 62
  • Medium 158
  • Low 20

Disclosures per year

Severity:
  1. Time-of-check Time-of-use (TOCTOU) Race Condition in Jenkins this entry
    Medium · 5.3 CVE-2021-21615 < 2.263.3, >= 2.264, < 2.276 2.263.3, 2.276
  2. Jenkins arbitrary type deserialization from attacker-controlled config.xml allows remote code execution and user impersonation
    High · 8.8 CVE-2026-53435 < 2.555.3, >= 2.556, < 2.568 2.555.3, 2.568
  3. Jenkins: Stored XSS vulnerability in node offline cause description
    High · 8.0 CVE-2026-53441 >= 2.483, < 2.568 2.568
  4. Jenkins has a link following vulnerability allows arbitrary file creation
    High · 8.8 CVE-2026-33001 < 2.555 2.555
  5. Jenkins has a DNS rebinding vulnerability in WebSocket CLI origin validation
    High · 7.5 CVE-2026-33002 >= 2.442, < 2.555 2.555
  6. Jenkins has a stored XSS vulnerability in node offline cause description
    High · 8.0 CVE-2026-27099 >= 2.542, < 2.551, >= 2.483, < 2.541.2 2.551, 2.541.2
  7. Jenkins has a Denial of service vulnerability in HTTP-based CLI
    High · 7.5 CVE-2025-67635 >= 2.529, < 2.541, < 2.528.3 2.541, 2.528.3
  8. Jenkins Remoting library arbitrary file read vulnerability
    High · 9.0 CVE-2024-43044 < 2.452.4, >= 2.460, < 2.462.1, >= 2.470, < 2.471 2.452.4, 2.462.1, 2.471
  9. Arbitrary file read vulnerability through the Jenkins CLI can lead to RCE
    Critical · 9.8 Exploited in attacks CVE-2024-23897 >= 1.606, < 2.426.3, >= 2.427, < 2.440.1, >= 2.441, < 2.442 2.426.3, 2.440.1, 2.442
  10. Cross-site WebSocket hijacking vulnerability in the Jenkins CLI
    High · 8.8 CVE-2024-23898 >= 2.217, < 2.426.3, >= 2.427, < 2.442, = 2.441 2.426.3, 2.442
  11. Jenkins temporary plugin file created with insecure permissions
    High · 7.0 CVE-2023-43496 >= 2.50, < 2.414.2, >= 2.415, < 2.424 2.414.2, 2.424
  12. Jenkins Cross-site Scripting vulnerability
    High · 8.0 CVE-2023-43495 >= 2.50, < 2.414.2, >= 2.415, < 2.424 2.414.2, 2.424
  13. Jenkins Stored Cross-site Scripting vulnerability
    High · 8.0 CVE-2023-39151 >= 2.402, < 2.414.1, < 2.401.3, >= 2.415, < 2.416 2.414.1, 2.401.3, 2.416
  14. Jenkins CSRF protection bypass vulnerability
    High · 8.0 CVE-2023-35141 < 2.400 2.400
  15. Cross-site Scripting vulnerability in Jenkins
    High · 8.8 CVE-2023-27898 >= 2.376, < 2.394, < 2.375.4 2.394, 2.375.4
  16. Incorrect Authorization in Jenkins Core
    High · 7.0 CVE-2023-27899 >= 2.376, < 2.387.1, < 2.375.4, >= 2.388, < 2.394 2.387.1, 2.375.4, 2.394
  17. Denial of service in Jenkins Core
    High · 7.5 CVE-2023-27901 >= 2.388, < 2.394, < 2.375.4, >= 2.376, < 2.387.1 2.394, 2.375.4, 2.387.1
  18. Jenkins vulnerable to stored cross site scripting in the I:helpIcon component
    High · 8.0 CVE-2022-41224 >= 2.367, < 2.370 2.370
  19. Cross-site Scripting vulnerability in Jenkins
    High · 8.0 CVE-2022-34170 >= 2.350, < 2.356, >= 2.320, < 2.332.4, >= 2.346, < 2.346.1 2.356, 2.332.4, 2.346.1
  20. Unauthorized view fragment access in Jenkins
    High · 7.5 CVE-2022-34175 >= 2.335, < 2.356 2.356
  21. Cross-site Scripting vulnerability in Jenkins
    High · 8.0 CVE-2022-34173 >= 2.340, < 2.356 2.356
Show more (20) Showing 21 of 82

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