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CVE-2026-42522VulnerabilityPublished Updated

org.jenkins-ci.plugins:github-branch-source · Jenkins GitHub Branch Source Plugin: Missing permissions check allows attackers to perform a connection test

Affects org.jenkins-ci.plugins:github-branch-sourceSource GCVE Database

0
Authoritative record:CVE-2026-42522· Medium 4.3

Not known to be exploited · CVSS 4.3 Medium : upgrade to 1967.1969.v205fd594c821 when convenient.

Data as of 27 Oct 2026, 00:07 UTC

CVSS 3.1 base score
4.3Medium
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 1967.1969.v205fd594c821
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 29 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Upgrade org.jenkins-ci.plugins:github-branch-source to 1967.1969.v205fd594c821.

Affected software

ProductAffectedFixed in
Mavenorg.jenkins-ci.plugins:github-branch-sourceAffected
  • <1967.1969.v205fd594c821
Fixed in
  • 1967.1969.v205fd594c821

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

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

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