---
id: CVE-2026-57303
aliases:
  - GHSA-2q27-6p2h-q6r3
title: Jenkins Assembla Plugin has an XXE vulnerability
summary: Jenkins Assembla Plugin has an XXE vulnerability
severity: high
cvss: 7.1
cwe:
  - CWE-918
vendor: jenkins-ci
product: 'org.jenkins-ci.plugins:assembla'
ecosystem: maven
affected:
  - 'org.jenkins-ci.plugins:assembla <= 1.4'
published: '2026-06-24'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T19:47:10Z'
source: GHSA
sourceUrl: 'https://github.com/advisories/GHSA-2q27-6p2h-q6r3'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-57303'
  - url: 'https://www.jenkins.io/security/advisory/2026-06-24/#SECURITY-3692%20(1)'
  - url: 'https://github.com/advisories/GHSA-2q27-6p2h-q6r3'
tags:
  - ghsa
  - maven
epss: 0.00359
epssPercentile: 0.26858
ingestedAt: '2026-09-25T20:17:49.422Z'
---

## Overview

Jenkins Assembla Plugin 1.4 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks when parsing responses from the configured Assembla server.

This allows attackers able to control the responses of the configured Assembla server to extract secrets from the Jenkins controller or perform server-side request forgery.

As of publication of this advisory, there is no fix.

## Affected packages

- `org.jenkins-ci.plugins:assembla <= 1.4`

## Remediation

Refer to the advisory for the patched release.