Jenkins vulnerability

Jenkins 2.421 through 2.579 (both inclusive), LTS 2.426.1 through 2.568.2 (both inclusive) does not correctly perform permission checks in the Appearance configuration page, allowing attackers with Overall/Manage permission to modify Appearance configuration options they should not have access to.

Published 2 Sep 2026Updated 15 Sep 20261 sources
CVSS 3.5

What happened

Jenkins 2.421 through 2.579 (both inclusive), LTS 2.426.1 through 2.568.2 (both inclusive) does not correctly perform permission checks in the Appearance configuration page, allowing attackers with Overall/Manage permission to modify Appearance configuration options they should not have access to.

Affected versions

Jenkins: 2.421 through 2.579; 2.426.1 through 2.568.2 Fixed: See vendor advisory.

Why it matters

Review the vendor advisory and exposure of the affected product to determine operational impact.

Detection & mitigation

  • Apply vendor-provided updates or mitigations.
  • Review affected product exposure and access logs.

Public PoC references

No public PoC reference has passed the current publication threshold.