CVE-2026-70427CWE-59

CVE-2026-70427

Medium · published August 5, 2026

CVSS v3.1
4.3
EPSS
0%
Percentile
36.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00434 · 36.6th percentile
Weakness
CWE-59 · Improper Link Resolution Before File Access ('Link Following')
Published
2026-08-05T22:17Z
Affected products (2)
ProductVersionsFixed in
jenkins/jenkins< 2.568.22.568.2
jenkins/jenkins< 2.5762.576
References (1)
https://www.jenkins.io/security/advisory/2026-08-05/#SECURITY-3930 · [email protected]
EPSS history
Timeline
  • 05 AUG 17:40Z
    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…
    cvelistv5