CVE-2026-70427

MEDIUM

Jenkins < 2.576 and LTS <= 2.568.1 - Arbitrary File Write via Crafted Tar Archive Symbolic Link Handling

Title source: llm
STIX 2.1

Description

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.

References (1)

Core 1
Core References
Vendor Advisory vendor-advisory
Jenkins Security Advisory 2026-08-05
https://www.jenkins.io/security/advisory/2026-08-05/#SECURITY-3930

Scores

CVSS v3 4.3
EPSS 0.0025
EPSS Percentile 16.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-59
Status published
Products (2)
Jenkins Project/Jenkins 2.568.2 - 2.568.*
Jenkins Project/Jenkins 2.576
Published Aug 05, 2026
Tracked Since Aug 05, 2026