What is CVE-2026-3113?

CVE-2026-3113 is a medium-severity vulnerability in Mattermost, classified under Incorrect Permission Assignment for Critical Resource. CVSS score: 5.0/10. Published 2026-03-26.

How severe is CVE-2026-3113?

Medium severity. CVSS v3 base score is 5.0 out of 10.

Vulnerability in Mattermost

CVE-2026-3113

Mattermost versions 11.4.x <= 11.4.0, 11.3.x <= 11.3.1, 11.2.x <= 11.2.3, 10.11.x <= 10.11.11 fail to set permissions on downloaded bulk export which allows other local users on the server to be able to read contents of the bulk export.. M…

EPSS: 0.000 (0.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.0 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N.

Affected products

Mattermost — versions 11.4.0, 11.3.0, 11.2.0

Weakness classification (CWE)

CWE-732 — Incorrect Permission Assignment for Critical Resource

References

MMSA-2026-00593 (vendor-advisory)

Frequently asked questions

What is CVE-2026-3113?: CVE-2026-3113 is a medium-severity vulnerability in Mattermost, classified under Incorrect Permission Assignment for Critical Resource. CVSS score: 5.0/10. Published 2026-03-26.
How severe is CVE-2026-3113?: Medium severity. CVSS v3 base score is 5.0 out of 10.