CVE-2026-70427: Security vulnerability

Published Aug 5, 2026
·
Updated

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.

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade Jenkins to a version that resolves this vulnerability.

    Fixed in 2.575
  2. Upgrade

    Upgrade Jenkins LTS to a version that resolves this vulnerability.

    Fixed in 2.568.1
  3. Compensating control

    Ensure attackers cannot control agent processes or submit crafted `.tar`/`.tar.gz` archives to the Jenkins controller (restrict who can run/submit agent content to the controller).

Event History

Aug 5, 2026
CVE Published
via MITRE·05:40 PM
Data Sourced
via MITRE·05:40 PM
Description
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