CVE-2026-70427: Jenkins

Medium severity, CVSS 4.3. EPSS: 0.4% chance of exploitation in the next 30 days.

Jenkins 2.575 and earlier, LTS 2.568.1 and earlier does not safely handle symbolic links with effectively empty names during the extraction of `.tar` and `.tar.gz` archives, allowing attackers able to control agent processes to provide crafted archives to the controller to write files to arbitrary locations on the file system, restricted only by file system access permissions of the user running Jenkins.

Affected products

• Jenkins Jenkins: before 2.568.2 (fixed in 2.568.2); before 2.576 (fixed in 2.576)

Published 2026-08-05. Last modified 2026-09-08.