CVE-2026-10600 — Denial of service via unbounded document content extraction in Mattermost Server

Description (CNA)

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

Affected (CNA)

Vendor / product	Versions
Mattermost / Mattermost	affected 11.8.0 through 11.8.0; affected 11.7.0 through 11.7.3; affected 11.6.0 through 11.6.5; affected 10.11.0 through 10.11.20; unaffected 11.9.0; unaffected 11.8.1; unaffected 11.7.4; unaffected 11.6.6; unaffected 10.11.21

CWE

CWE-770

References

https://mattermost.com/security-updates

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.