CVE-2026-84646

Medium

Description

In Jenkins 2.579 and earlier, LTS 2.568.2 and earlier, user objects can appear as nested field values in other deserialized XML objects, allowing attackers with Overall/Read permission to create user objects by submitting crafted XML.

SeverityMedium

CVSS4.3

Exploit probability—

Product

Jenkins

PublishedSep 2, 2026

First seenSep 2, 2026

Weakness typeCWE-502Deserialization of untrusted data

How to fix

Update

jenkins jenkins2.568.3, 2.580 or later

Vendor advisories

jenkins.io/security/advisory/2026-09-02/#SECURITY-3908

Affected products

Product	Affected versions	Fixed in
jenkins jenkins	v < 2.568.3, v < 2.580	2.568.3, 2.580

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