CVE-2026-24661
Denial of Service via Oversized Payload in Mattermost Plugins
Publication date: 2026-04-09
Last updated on: 2026-04-17
Assigner: Mattermost, Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| mattermost | mattermost | to 2.3.2.0 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-770 | The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability exists in Mattermost Plugins versions up to 2.1.3.0 where the {{/changes}} webhook endpoint does not limit the size of the request body. An authenticated attacker can exploit this by sending an oversized JSON payload, which can cause memory exhaustion and lead to a denial of service.
How can this vulnerability impact me? :
The impact of this vulnerability is primarily a denial of service condition. By sending an oversized JSON payload to the vulnerable endpoint, an attacker can exhaust the server's memory resources, potentially causing the service to crash or become unresponsive.