Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 fail to handle incorrectly reported array lengths which allows malicious user to cause OOM errors and crash the server via sending corrupted msgpack frames within websocket messages to calls plugin. Mattermost Advisory ID: MMSA-2025-00537
Metrics
Affected Vendors & Products
References
| Link | Providers |
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| https://mattermost.com/security-updates |
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History
Wed, 18 Mar 2026 14:00:00 +0000
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| CPEs | cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:* | |
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Mattermost mattermost Server
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Tue, 17 Mar 2026 14:15:00 +0000
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ssvc
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Tue, 17 Mar 2026 10:00:00 +0000
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Mattermost mattermost |
Mon, 16 Mar 2026 20:30:00 +0000
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| Description | Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 fail to handle incorrectly reported array lengths which allows malicious user to cause OOM errors and crash the server via sending corrupted msgpack frames within websocket messages to calls plugin. Mattermost Advisory ID: MMSA-2025-00537 | |
| Title | DoS in Calls plugin via malformed msgpack in websocket request. | |
| Weaknesses | CWE-1287 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: Mattermost
Published: 2026-03-16T20:10:16.644Z
Updated: 2026-03-17T13:37:43.947Z
Reserved: 2026-02-13T10:11:47.778Z
Link: CVE-2026-2454
Updated: 2026-03-17T13:37:40.901Z
Status : Analyzed
Published: 2026-03-16T21:16:33.890
Modified: 2026-03-18T13:56:03.590
Link: CVE-2026-2454
No data.