What is CVE-2019-1003026?

CVE-2019-1003026 is a medium-severity vulnerability in Jenkins Mattermost, classified under Server-Side Request Forgery (SSRF). CVSS score: 4.3/10. Published 2019-02-20.

How severe is CVE-2019-1003026?

Medium severity. CVSS v3 base score is 4.3 out of 10.

SSRF in Jenkins Mattermost

CVE-2019-1003026

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.

Vulnerability class: SSRF (Server-Side Request Forgery)

Published 2019-02-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.009 (58.0th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 58.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Jenkins Mattermost
Jenkins Project Mattermost Notification Plugin — versions 2.6.2 and earlier

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

jenkins.io/security/advisory/2019-02-19/ (Vendor Advisory)
www.securityfocus.com/bid/107295 (VDB Entry, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2019-1003026?: CVE-2019-1003026 is a medium-severity vulnerability in Jenkins Mattermost, classified under Server-Side Request Forgery (SSRF). CVSS score: 4.3/10. Published 2019-02-20.
How severe is CVE-2019-1003026?: Medium severity. CVSS v3 base score is 4.3 out of 10.