Symbolic Link Handling Issue in Jenkins by CloudBees
CVE-2026-70427

4.3MEDIUM

Key Information:

Vendor

Jenkins
Status
Jenkins
Vendor
CVE Published:
5 August 2026

What is CVE-2026-70427?

A vulnerability in Jenkins allows attackers to exploit improper handling of symbolic links when extracting .tar and .tar.gz archives. By crafting malicious archive files, an attacker capable of controlling agent processes can trick the Jenkins controller into writing files to unauthorized locations on the file system. The impact is restricted only by the file system access permissions of the user running Jenkins, which can lead to significant security risks. Proper sanitization and handling of symbolic links are crucial to mitigate this issue.

Affected Version(s)

Jenkins 2.576

Jenkins 2.576

Jenkins 2.568.2 < 2.568.*

References

https://www.jenkins.io/security/advisory/2026-08-05/#SECU...
vendor-advisory

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.