How severe is CVE-2026-42524?

CVE-2026-42524 has a CVSS 3.x base score of 8.0, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-42524 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-42524?

CVE-2026-42524 affects Jenkins Html Publisher. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-42524?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-42524 have an EU (EUVD) identifier?

Yes. CVE-2026-42524 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26226.

When was CVE-2026-42524 published?

CVE-2026-42524 was published on 2026-04-29 and last updated on 2026-06-17.

CVE-2026-42524

CVE-2026-42524 is a high-severity vulnerability in Jenkins Html Publisher with a CVSS 3.x base score of 8.0. 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-79.

Key facts

Severity: High (CVSS 3.x base score 8.0)
EPSS exploit prediction: 0% (20th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-26226
Weakness: CWE-79
Affected product: Jenkins Html Publisher
Published: 2026-04-29
Last modified: 2026-06-17

Description

Jenkins HTML Publisher Plugin 427 and earlier does not escape job name and URL in the legacy wrapper file, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Item/Configure permission.

Frequently asked questions

What is CVE-2026-42524?: Jenkins HTML Publisher Plugin 427 and earlier does not escape job name and URL in the legacy wrapper file, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Item/Configure permission.
How severe is CVE-2026-42524?: CVE-2026-42524 has a CVSS 3.x base score of 8.0, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-42524 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-42524?: CVE-2026-42524 affects Jenkins Html Publisher. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-42524?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-42524 have an EU (EUVD) identifier?: Yes. CVE-2026-42524 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26226.
When was CVE-2026-42524 published?: CVE-2026-42524 was published on 2026-04-29 and last updated on 2026-06-17.

References

https://www.jenkins.io/security/advisory/2026-04-29/#SECURITY-3706

Affected products (1)

cpe:2.3:a:jenkins:html_publisher:*:*:*:*:*:jenkins:*:*

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