---
id: CVE-2026-84646
title: >-
  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.
summary: >-
  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.
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N'
cwe:
  - CWE-502
vendor: jenkins
product: jenkins
affected:
  - jenkins < 2.568.3
  - jenkins < 2.580
patched:
  - jenkins 2.580
published: '2026-09-02'
updated: '2026-09-11'
sourceUpdated: '2026-09-11T21:15:45.160'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-84646'
references:
  - url: 'https://www.jenkins.io/security/advisory/2026-09-02/#SECURITY-3908'
    label: jenkinsci-cert@googlegroups.com
tags:
  - nvd
epss: 0.00276
epssPercentile: 0.20275
ingestedAt: '2026-09-12T00:03:49.031Z'
---

## Overview

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.

## Affected

- `jenkins < 2.568.3`
- `jenkins < 2.580`

## Remediation

Upgrade past the affected range:

- `jenkins 2.580`