What is CVE-2026-2476?

CVE-2026-2476 is a high-severity vulnerability in Mattermost, classified under Information Disclosure. CVSS score: 7.6/10. Published 2026-03-16.

How severe is CVE-2026-2476?

High severity. CVSS v3 base score is 7.6 out of 10.

Information disclosure in Mattermost

CVE-2026-2476

Mattermost Plugins versions <=2.0.3.0 fail to properly mask sensitive configuration values which allows an attacker with access to support packets to obtain original plugin settings via exported configuration data. Mattermost Advisory ID…

Vulnerability class: Information Disclosure

EPSS: 0.000 (13.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:L/A:N.

Affected products

Mattermost — versions 0, 2.3.1.0

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

MMSA-2026-00606 (vendor-advisory)

Frequently asked questions

What is CVE-2026-2476?: CVE-2026-2476 is a high-severity vulnerability in Mattermost, classified under Information Disclosure. CVSS score: 7.6/10. Published 2026-03-16.
How severe is CVE-2026-2476?: High severity. CVSS v3 base score is 7.6 out of 10.