CVE-2026-117621

Medium

Description

Jenkins 2.587 and earlier, LTS 2.580.1 and earlier computes on the agent the URL of the link shown in the workspace browser for each file and directory, resulting in a cross-site scripting (XSS) vulnerability exploitable by attackers in control of agent processes.

SeverityMedium

CVSS6.1

Exploit probability—

Product

Jenkins

PublishedOct 28, 2026

First seenNov 4, 2026

Weakness typeCWE-79Cross-site scripting (XSS)

How to fix

Update

jenkins jenkins2.580.2, 2.588 or later

Vendor advisories

jenkins.io/security/advisory/2026-10-28/#SECURITY-4232

Affected products

Product	Affected versions	Fixed in
jenkins jenkins	v < 2.580.2, v < 2.588	2.580.2, 2.588

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