How severe is CVE-2026-42522?

CVE-2026-42522 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2026-42522 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-42522?

CVE-2026-42522 affects Jenkins Github Branch Source. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-42522?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-42522 have an EU (EUVD) identifier?

Yes. CVE-2026-42522 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26224.

When was CVE-2026-42522 published?

CVE-2026-42522 was published on 2026-04-29 and last updated on 2026-06-17.

CVE-2026-42522

CVE-2026-42522 is a medium-severity vulnerability in Jenkins Github Branch Source with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-862.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
EPSS exploit prediction: 0% (8th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-26224
Weakness: CWE-862
Affected product: Jenkins Github Branch Source
Published: 2026-04-29
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2026-42522?: 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 severe is CVE-2026-42522?: CVE-2026-42522 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2026-42522 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-42522?: CVE-2026-42522 affects Jenkins Github Branch Source. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-42522?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-42522 have an EU (EUVD) identifier?: Yes. CVE-2026-42522 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26224.
When was CVE-2026-42522 published?: CVE-2026-42522 was published on 2026-04-29 and last updated on 2026-06-17.

References

https://www.jenkins.io/security/advisory/2026-04-29/#SECURITY-3702

Affected products (1)

cpe:2.3:a:jenkins:github_branch_source:*:*:*:*:*:jenkins:*:*

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