EUVD-2026-20882
GHSA-5rfv-h47g-xj42
3.7
CVSS 3.1
CVSS Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
Lifecycle Timeline
3
EUVD ID Assigned
Apr 09, 2026 - 10:30 euvd
EUVD-2026-20882
Analysis Generated
Apr 09, 2026 - 10:30 vuln.today
CVE Published
Apr 09, 2026 - 10:12 nvd
LOW 3.7
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
Analysis
Mattermost Plugins versions 2.1.3.0 and earlier allow remote attackers without authentication to cause denial of service through memory exhaustion by sending oversized JSON payloads to the /changes webhook endpoint. The vulnerability stems from a lack of request body size validation, enabling attackers to exhaust server memory and crash the service. …
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Priority Score
19
Low
Medium
High
Critical
KEV: 0
EPSS: +0.0
CVSS: +18
POC: 0
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