---
id: CVE-2026-84648
title: >-
  In Jenkins 2.579 and earlier, LTS 2.568.2 and earlier, the system log viewer
  does not escape log record metadata (source, level, and timestamp) resulting
  in a stored cross-site scripting (XSS) vulnerability exploitable by attackers
  in co…
summary: >-
  In Jenkins 2.579 and earlier, LTS 2.568.2 and earlier, the system log viewer
  does not escape log record metadata (source, level, and timestamp) resulting
  in a stored cross-site scripting (XSS) vulnerability exploitable by attackers
  in co…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-79
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: '2026-09-11T21:14:57.963'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-84648'
references:
  - url: 'https://www.jenkins.io/security/advisory/2026-09-02/#SECURITY-3967'
    label: jenkinsci-cert@googlegroups.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-02T17:39:10.453508Z'
ingestedAt: '2026-09-14T13:15:02.806Z'
epss: 0.00583
epssPercentile: 0.45452
---

## Overview

In Jenkins 2.579 and earlier, LTS 2.568.2 and earlier, the system log viewer does not escape log record metadata (source, level, and timestamp) resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers in control of agent processes.

## Affected

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

## Remediation

Upgrade past the affected range:

- `jenkins 2.580`