How severe is CVE-2026-42519?

CVE-2026-42519 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 low, integrity none, and availability none.

Is CVE-2026-42519 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-42519?

CVE-2026-42519 affects Jenkins Script Security. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-42519?

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

Does CVE-2026-42519 have an EU (EUVD) identifier?

Yes. CVE-2026-42519 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26220.

When was CVE-2026-42519 published?

CVE-2026-42519 was published on 2026-04-29 and last updated on 2026-06-17.

CVE-2026-42519

CVE-2026-42519 is a medium-severity vulnerability in Jenkins Script Security 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% (7th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-26220
Weakness: CWE-862
Affected product: Jenkins Script Security
Published: 2026-04-29
Last modified: 2026-06-17

Description

A missing permission check in Jenkins Script Security Plugin 1399.ve6a_66547f6e1 and earlier allows attackers with Overall/Read permission to enumerate pending and approved Script Security classpaths.

Frequently asked questions

What is CVE-2026-42519?: A missing permission check in Jenkins Script Security Plugin 1399.ve6a_66547f6e1 and earlier allows attackers with Overall/Read permission to enumerate pending and approved Script Security classpaths.
How severe is CVE-2026-42519?: CVE-2026-42519 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 low, integrity none, and availability none.
Is CVE-2026-42519 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-42519?: CVE-2026-42519 affects Jenkins Script Security. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-42519?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-42519 have an EU (EUVD) identifier?: Yes. CVE-2026-42519 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26220.
When was CVE-2026-42519 published?: CVE-2026-42519 was published on 2026-04-29 and last updated on 2026-06-17.

References

https://www.jenkins.io/security/advisory/2026-04-29/#SECURITY-3662

Affected products (1)

cpe:2.3:a:jenkins:script_security:*:*:*:*:*:jenkins:*:*

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