CVE-2026-42522

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

4.3 MediumFix available

A missing permission check in Jenkins GitHub Branch Source Plugin 1967.vdea_d580c1a_b_a_ and earlier allows attackers with Overall/Read permission to connect to an attacker-specified URL with attacker-specified GitHub App credentials.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: Low
Availability: None

Exploit likelihood

0.18%Up 0.2 points since Apr 30, 2026

What each source reports

CVE List Score used 4.3

Record: CVE-2026-42522
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Weakness: CWE-862
Updated: 2026-11-02

EUVDEUVD-2026-26224 4.3

Record: EUVD-2026-26224
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-wg26-8wmj-cf9p 4.3

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

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.

Record: GHSA-wg26-8wmj-cf9p
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Weakness: CWE-862
Updated: 2026-11-02

NVD 4.3

Record: CVE-2026-42522
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Weakness: CWE-862
Updated: 2026-11-02

OSV 4.3

Record: CVE-2026-42522
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Updated: 2026-11-02

OSVGHSA-wg26-8wmj-cf9p 4.3

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

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.

Record: GHSA-wg26-8wmj-cf9p
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Weakness: CWE-862
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`org.jenkins-ci.plugins:github-branch-source` Maven	before 1967.1969.v205fd594c821	1967.1969.v205fd594c821
`org.jenkins-ci.plugins:github-branch-source` Maven	before 1967.1969.v205fd594c821, plus listed versions 0.1-beta-10.1-beta-20.1-beta-30.1-beta-41.0 Show 45 moreShow less 1.11.101.10.11.21.31.41.4-beta-11.51.61.71.81.8.11.91577.v83564088883f1583.v18d333ef73791598.v91207e9f9b_4a_1599.v9fb_798a_a_7c4f1602.vfe89fe441b_361619.v962f131fa_c151628.vb_2f51293cb_781637.vd833b_7ca_76541656.v77eddb_b_e95df1677.v731f745ea_0cf1687.v7618247e672d1694.vd46793a_c4a_571695.v88de84e9f6b_91696.v3a_7603564d041701.v00cc8184df931703.vd5a_2b_29c6cdc1725.vd391eef681a_e1728.v859147241f491730.vff97c8a_1f8041732.v3f1889a_c475b_1734.v8a_ed3a_6534901740.v51d5810e9e8c1741.va_3028eb_9fd211748.v6b_61a_1dc35b_41750.v6b_fb_8df8f9851751.v90e17c48a_6a_c1752.vc201a_0235d801755.vcdb_d136f3b_251758.v048414714f5d1767.va_7d01ea_c72561771.v59b_6a_fa_1b_89e1772.va_69eda_d018d4	1967.1969.v205fd594c821

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-42522 is a medium vulnerability (CVSS 4.3) in Jenkins Github Branch Source, published April 29, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.18%, the 8th percentile. Fixed in org.jenkins-ci.plugins:github-branch-source 1967.1969.v205fd594c821.

References

This page doesn't list everything

Left out here: 112 versions. The JSON record has them.