CVE-2026-10600

Denial of service via unbounded document content extraction in Mattermost Server

State: Published
Severity: 4.3 Medium
Published: Jul 27, 2026
Updated: Jul 27, 2026
Reserved: Jun 2, 2026

Description

Mattermost versions 11.8.x <= 11.8.0, 11.7.x <= 11.7.3, 11.6.x <= 11.6.5, 10.11.x <= 10.11.20 fail to bound the time and resource consumption of server-side document content extraction which allows an authenticated user with file-upload permission to degrade file uploads for all users on the server via repeatedly uploading small documents that are cheap to upload but expensive to extract, saturating the shared extraction worker pool.. Mattermost Advisory ID: MMSA-2026-00694

Scores

CVSS	Score	Vector	Source
3.1	4.3 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L	Mattermost

Weaknesses

CWE-770 Allocation of Resources Without Limits or Throttling

Affected Products

Product	Versions
MattermostMattermost	11.8.0 through 11.8.0Affected 11.7.0 through 11.7.3Affected 11.6.0 through 11.6.5Affected 10.11.0 through 10.11.20Affected 11.9.0Not affected 11.8.1Not affected 11.7.4Not affected 11.6.6Not affected 10.11.21Not affected

References

MMSA-2026-00694vendor-advisory

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