Is there a public exploit for CVE-2026-117623?

No public exploit for CVE-2026-117623 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-117623?

CVE-2026-117623 scores CVSS 5.4 (v3.1), rated medium.

5.4 Medium

Jenkins 2.587 and earlier, LTS 2.580.1 and earlier does not escape the text shown in the tooltips of breadcrumb bar overflow menu entries,…

CVE-2026-117623

Jenkins 2.587 and earlier, LTS 2.580.1 and earlier does not escape the text shown in the tooltips of breadcrumb bar overflow menu entries, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Overall/Read permission.

Assessment

CVSS: 5.4 (v3.1)
Severity: Medium
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 28 October 2026
Last updated: 2 November 2026
Weakness: CWE-79
Assigner: jenkinsci-cert@googlegroups.com

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

At the source

References

https://www.jenkins.io/security/advisory/2026-10-28/#SECURITY-4229

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