EUVD-2026-49253
GHSA-hmmp-647g-6q22
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Primary rating from Vendor (Mattermost) · only source for this CVE.
CVSS VectorVendor: Mattermost
Lifecycle Timeline
1DescriptionCVE.org
Mattermost versions 11.8.x <= 11.8.0, 11.7.x <= 11.7.3, 11.6.x <= 11.6.5, 10.11.x <= 10.11.20 fail to bound the time and resource consumption of server-side document content extraction which allows an authenticated user with file-upload permission to degrade file uploads for all users on the server via repeatedly uploading small documents that are cheap to upload but expensive to extract, saturating the shared extraction worker pool.. Mattermost Advisory ID: MMSA-2026-00694
AnalysisAI
Denial of service in Mattermost 10.11.x through 11.8.x allows authenticated users with file-upload permission to degrade file-upload performance for all users by exploiting unbounded resource consumption during server-side document extraction. Attackers can repeatedly upload small documents that are expensive to extract, saturating the extraction worker pool and causing service degradation. No active exploitation or public exploit code is reported, but the low attack complexity and minimal privileges make this an accessible DoS vector.
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Same technique Denial Of Service
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External POC / Exploit Code
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