Service interruption via unbounded webhook request body
Published Mar 26, 2026 · Updated Mar 26, 2026
Resource exhaustion in the Mattermost Zoom Plugin allows remote authenticated users to interrupt service through its webhook endpoint. The Zoom webhook handler processes an incoming HTTP request body without enforcing a size limit, allowing an oversized payload to consume server resources. Administrative privileges and network access to the endpoint are required; the reported consequence is availability loss, not data access or modification.
Summary
What happened
Resource exhaustion in the Mattermost Zoom Plugin allows remote authenticated users to interrupt service through its webhook endpoint. The Zoom webhook handler processes an incoming HTTP request body without enforcing a size limit, allowing an oversized payload to consume server resources. Administrative privileges and network access to the endpoint are required; the reported consequence is availability loss, not data access or modification.
The record
- CVE
- CVE-2026-3116
- Published
- Mar 26, 2026
- Updated
- Mar 26, 2026
- Vendor
- Mattermost
- Product
- Mattermost
- Classifications
- CWE-400, T1499
- Attack vector
- network
- Privileges
- admin
Timeline
How it unfolded
- Mar 26, 2026CVE publishedPublication date reported by the CVE source.
- Mar 26, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <=10.11.11
- Affected versionversion=0 <=11.0.4
- Affected versionversion=0 <=11.1.3
- Affected versionversion=0 <=11.3.2
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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