CVE-2026-6961

CVSS Score & Metrics

Base Score

7.6 / 10

Vector String

                                        CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:L                                    

Vulnerability Description

Mattermost versions 11.6.x <= 11.6.1, 11.5.x <= 11.5.4, 10.11.x <= 10.11.15, 10.11.x <= 10.11.16 Mattermost fails to sanitize FileInfo.Name received from federated peers during shared channel file sync, which allows an attacker who controls a federated server to write files to arbitrary locations within the target server's filestore via path traversal sequences in the filename field.. Mattermost Advisory ID: MMSA-2026-00661

Vulnerability Details

Published Date

June 12, 2026

Last Modified

June 18, 2026

CWE ID

CWE-22

Source

NVD

Vendor

mattermost

Product

mattermost_server

External References

https://mattermost.com/security-updates

CVSS Score & Metrics

Vulnerability Description

Vulnerability Details

External References

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