CVE-2026-42522: A missing permission check in Jenkins GitHub Branch Source Plugin 1967.vdea_d580c1a_b_a_ and earlier allows at

Q: How do I fix CVE-2026-42522?

github branch source: upgrade to newer than 1967.vdea_d580c1a_b_a. Exact commands for each OS are on this page.

Q: Is CVE-2026-42522 being exploited?

CVE-2026-42522 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-42522 affect?

CVE-2026-42522 affects github branch source. Severity is medium (CVSS 4.3). 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.

Q: How urgent is CVE-2026-42522?

Priority 17/100. No elevated risk signals yet.

Routine

MEDIUM 4.3UPGRADE

CVE-2026-42522 is a medium-severity flaw (CVSS 4.3) affecting github branch source. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 92%)
CISA exploited list	No
Weakness	CWE-862
Published	2026-04-29
Last modified	2026-10-26

Publisher (CNA): Jenkins Project · Vendor: jenkins

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-29 14:16 UTCPublished CVE record published
2026-10-26 20:10 UTCUpdated Record last modified

jenkins github branch source UPGRADE

Affected: <= 1967.vdea_d580c1a_b_a

Fixed in: newer than 1967.vdea_d580c1a_b_a

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy github-branch-source || rpm -q github-branch-source || github-branch-source --version

2. UPGRADE to newer than 1967.vdea_d580c1a_b_a (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade github-branch-source

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade github-branch-source

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-42522?

github branch source: upgrade to newer than 1967.vdea_d580c1a_b_a. Exact commands for each OS are on this page.

Is CVE-2026-42522 being exploited?

CVE-2026-42522 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-42522 affect?

CVE-2026-42522 affects github branch source. Severity is medium (CVSS 4.3). 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.

How urgent is CVE-2026-42522?

Priority 17/100. No elevated risk signals yet.

Software pages

Jenkins vulnerabilities · GitHub vulnerabilities

Related CVEs

CVE-2026-57285 MEDIUM 4.3 UPGRADE A missing permission check in Jenkins GitHub Branch Source Plugin 1967.1969.v205fd594c821 and earlier allows a

References

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