Vulnerability DatabaseCVE-2026-4053
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CVE-2026-4053
Published:May 15, 2026
Updated:May 18, 2026
Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13 fail to enforce the PostEditTimeLimit on non-message post fields which allows an authenticated user to modify post file attachments, props, and pin status after the edit window has expired via the post patch and update API endpoints.. Mattermost Advisory ID: MMSA-2026-00631
Affected Packages
github.com/mattermost/mattermost (GO):
Affected version(s) >=v11.5.0 <v11.5.2
Fix Suggestion:
Update to version v11.5.2
github.com/mattermost/mattermost (GO):
Affected version(s) >=v10.11.0 <v10.11.14
Fix Suggestion:
Update to version v10.11.14
Related Resources (1)
https://mattermost.com/security-updates
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CVSS v4
Base Score:
2.3
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
3.1
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Operation on a Resource after Expiration or Release
CWE-672
EPSS
Base Score:
0.04