CVE-2026-3113

mmctl export download command doesn’t restrict permissions to created file to file owner

State: Published
Severity: 5.0 Medium
Published: Mar 26, 2026
Updated: Mar 26, 2026
Reserved: Feb 24, 2026

Description

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.. Mattermost Advisory ID: MMSA-2026-00593

Scores

CVSS	Score	Vector	Source
3.1	5.0 Medium	CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N	Mattermost

Weaknesses

CWE-732 Incorrect Permission Assignment for Critical Resource

Affected Products

Product	Versions
MattermostMattermost	11.4.0 through 11.4.0Affected 11.3.0 through 11.3.1Affected 11.2.0 through 11.2.3Affected 10.11.0 through 10.11.11Affected 11.5.0Not affected 11.4.1Not affected 11.3.2Not affected 11.2.4Not affected 10.11.12Not affected

References

MMSA-2026-00593vendor-advisory

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