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Description

Mattermost Plugins versions <=2.1.3.0 fail to limit the request body size on the {{/changes}} webhook endpoint which allows an authenticated attacker to cause memory exhaustion and denial of service via sending an oversized JSON payload. Mattermost Advisory ID: MMSA-2026-00611

PUBLISHED Reserved 2026-02-11 | Published 2026-04-09 | Updated 2026-04-09 | Assigner Mattermost




LOW: 3.7CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

Problem types

CWE-770: Allocation of Resources Without Limits or Throttling

Product status

Default status
unaffected

Any version
affected

2.3.2.0
unaffected

Credits

Lorenzo Gallegos finder

References

mattermost.com/security-updates (MMSA-2026-00611) vendor-advisory

cve.org (CVE-2026-24661)

nvd.nist.gov (CVE-2026-24661)

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