CVE-2026-96260 — Mattermost server missing request body size limit on plugin routes allows denial of service by an authenticated user

CVE-2026-96260

Mattermost server missing request body size limit on plugin routes allows denial of service by an authenticated user PUBLISHED

Description (CNA)

Mattermost versions 11.9.x <= 11.9.1, 11.8.x <= 11.8.5, 11.7.x <= 11.7.10, 11.10.x <= 11.10.1 fail to enforce a request body size limit during CSRF validation of plugin requests which allows an authenticated user to exhaust server memory and cause a denial of service via a large request body sent to a plugin endpoint.. Mattermost Advisory ID: MMSA-2026-00775

Affected (CNA)

Vendor / product	Versions
Mattermost / Mattermost	affected 11.9.0 through 11.9.1; affected 11.8.0 through 11.8.5; affected 11.7.0 through 11.7.10; affected 11.10.0 through 11.10.1; unaffected 11.11.0; unaffected 11.9.2; unaffected 11.8.6; unaffected 11.7.11; unaffected 11.10.2

CWE

CWE-789

References

https://mattermost.com/security-updates

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.