CVE-2026-4858

CVSS Score & Metrics

Base Score

8.0 / 10

Vector String

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

Vulnerability Description

Mattermost versions 11.6.x <= 11.6.0, 11.5.x <= 11.5.3, 11.4.x <= 11.4.4, 10.11.x <= 10.11.14 fail to check integration URL for path traversal which allows an malicious authenticated user to call an arbitrary API via system admin Mattermost auth token using via path traversal in integration action URL.. Mattermost Advisory ID: MMSA-2026-00640

Vulnerability Details

Published Date

May 21, 2026

Last Modified

May 21, 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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