CVE-2026-57303

High

Description

Jenkins Assembla Plugin 1.4 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks, allowing attackers able to control the responses of the configured Assembla server to extract secrets from the Jenkins controller or perform server-side request forgery.

SeverityHigh

CVSS7.1

Exploit probability—

Product

Jenkins Assembla

PublishedJun 24, 2026

First seenJun 24, 2026

Weakness typeCWE-918Server-side request forgery (SSRF)

How to fix

Vendor advisories

jenkins.io/security/advisory/2026-06-24/#SECURITY-3692%20(1)

Affected products

Product	Affected versions	Fixed in
jenkins assembla	v ≤ 1.4	—
org.jenkins-ci.plugins:assemblaMaven	v ≤ 1.4	—

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