Jenkins GitHub Branch Source Plugin: Missing permissions check allows attackers to perform a connection test

GHSA-wg26-8wmj-cf9p · CVE-2026-42522

Published Apr 29, 2026 · Modified May 6, 2026

Description

Jenkins GitHub Branch Source Plugin versions 1967.vdea_d580c1a_b_a_ and earlier do not perform a permission check in a method implementing form validation.

This allows attackers with Overall/Read permission to connect to an attacker-specified URL with attacker-specified GitHub App credentials.

GitHub Branch Source Plugin 1967.1969.v205fd594c821 requires Overall/Manage permission to perform the connection test.

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2026-42522
WEB https://www.jenkins.io/security/advisory/2026-04-29/#SECURITY-3702

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