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,…

published 2026-10-28 11 d ago modified 2026-11-05 3 d ago also EUVD-2026-112188

cvss: 5.4; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 19%
public exploits: 0; none known

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.

Patch / fix

fixed in 1

Jenkins Project Jenkins 2.588

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-117623 updated 2026-11-06 cvss 5.4

jenkins: Jenkins: Stored cross-site scripting via unescaped breadcrumb bar tooltips

Red Hat All currently supported Red Hat products
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 3 d ago (2026-11-05)

Exploit prediction

0.27% chance of exploitation in the next 30 days, higher than 19% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	5.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
NVD	3.1	5.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
CNA	3.1	5.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Affected products

Jenkins Project Jenkins

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

Technology feeds

Jenkins rss critical rss

References

jenkins.io /security/advisory/2026-10-28/#SECURITY-4229
vendor-advisory, mitigation

Sources

CVE List CVE-2026-117623
NVD CVE-2026-117623

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary