CVE-2026-84653

Description

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.

References

• https://www.jenkins.io/security/advisory/2026-09-02/#SECURITY-3981