CVE-2019-1003026: Jenkins Mattermost

Medium severity, CVSS 4.3. EPSS: 0.9% chance of exploitation in the next 30 days.

A server-side request forgery vulnerability exists in Jenkins Mattermost Notification Plugin 2.6.2 and earlier in MattermostNotifier.java that allows attackers with Overall/Read permission to have Jenkins connect to an attacker-specified Mattermost server and room and send a message.

Affected products

• Jenkins Mattermost: up to and including 2.6.2

Published 2019-02-20. Last modified 2026-06-17.