---
id: CVE-2026-70427
title: >-
  Jenkins 2.575 and earlier, LTS 2.568.1 and earlier does not safely handle
  symbolic links with effectively empty names during the extraction of `.tar`
  and `.tar.gz` archives, allowing attackers able to control agent processes to
  provide c…
summary: >-
  Jenkins 2.575 and earlier, LTS 2.568.1 and earlier does not safely handle
  symbolic links with effectively empty names during the extraction of `.tar`
  and `.tar.gz` archives, allowing attackers able to control agent processes to
  provide c…
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-59
vendor: jenkins
product: jenkins
affected:
  - jenkins < 2.568.2
  - jenkins < 2.576
patched:
  - jenkins 2.576
published: '2026-08-05'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T20:17:23.773'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-70427'
references:
  - url: 'https://www.jenkins.io/security/advisory/2026-08-05/#SECURITY-3930'
    label: jenkinsci-cert@googlegroups.com
tags:
  - nvd
epss: 0.00328
epssPercentile: 0.26108
ingestedAt: '2026-09-08T21:11:12.268Z'
---

## Overview

Jenkins 2.575 and earlier, LTS 2.568.1 and earlier does not safely handle symbolic links with effectively empty names during the extraction of `.tar` and `.tar.gz` archives, allowing attackers able to control agent processes to provide crafted archives to the controller to write files to arbitrary locations on the file system, restricted only by file system access permissions of the user running Jenkins.

## Affected

- `jenkins < 2.568.2`
- `jenkins < 2.576`

## Remediation

Upgrade past the affected range:

- `jenkins 2.576`