CVE-2026-117613

Medium

Description

Jenkins 2.587 and earlier, LTS 2.580.1 and earlier does not restrict item types in collections after deserialization, allowing attackers with access to POST config.xml API endpoints to submit crafted `config.xml` files that can lead to, e.g., stored cross-site scripting (XSS) vulnerabilities.

SeverityMedium

CVSS5.4

Exploit probability—

Product

Jenkins

PublishedOct 28, 2026

First seenNov 4, 2026

Weakness typeCWE-502Deserialization of untrusted data

How to fix

Update

jenkins jenkins2.580.2, 2.588 or later

Vendor advisories

jenkins.io/security/advisory/2026-10-28/#SECURITY-4225

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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