Bug 2451779 (CVE-2026-3114) - CVE-2026-3114 Mattermost: Mattermost: Denial of Service via crafted zip archives
Summary: CVE-2026-3114 Mattermost: Mattermost: Denial of Service via crafted zip archives
Keywords:
Status: NEW
Alias: CVE-2026-3114
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-03-26 17:02 UTC by OSIDB Bzimport
Modified: 2026-03-26 19:30 UTC (History)
0 users

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)

Description OSIDB Bzimport 2026-03-26 17:02:06 UTC 
Mattermost versions 11.4.x <= 11.4.0, 11.3.x <= 11.3.1, 11.2.x <= 11.2.3, 10.11.x <= 10.11.11 fail to validate decompressed archive entry sizes during file extraction which allows authenticated users with file upload permissions to cause a denial of service via crafted zip archives containing highly compressed entries (zip bombs) that exhaust server memory.. Mattermost Advisory ID: MMSA-2026-00598
Note You need to log in before you can comment on or make changes to this bug.