Mattermost Plugins versions <=2.3.1 fail to limit the request body size on the {{/lifecycle}} 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-2026-00610
Metrics
Affected Vendors & Products
References
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| https://mattermost.com/security-updates |
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History
Thu, 09 Apr 2026 12:15:00 +0000
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| Metrics |
ssvc
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Thu, 09 Apr 2026 10:30:00 +0000
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| Description | Mattermost Plugins versions <=2.3.1 fail to limit the request body size on the {{/lifecycle}} 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-2026-00610 | |
| Title | Unbounded Request Body Read in MS Teams Plugin {{/lifecycle}} Webhook Endpoint | |
| Weaknesses | CWE-770 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: Mattermost
Published:
Updated: 2026-04-09T11:44:54.614Z
Reserved: 2026-02-11T20:56:06.579Z
Link: CVE-2026-21388
Updated: 2026-04-09T11:44:50.805Z
Status : Received
Published: 2026-04-09T11:16:20.897
Modified: 2026-04-09T11:16:20.897
Link: CVE-2026-21388
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OpenCVE Enrichment
No data.