PT-2026-41658 · Mattermost · Mattermost

0X7Oda7123

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CVE-2026-6343

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Published

2026-05-18

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Updated

2026-07-30

CVSS v3.1

4.3

Medium

VectorAV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Name of the Vulnerable Software and Affected Versions Mattermost versions 11.5.0 through 11.5.1 Mattermost versions 10.11.0 through 10.11.13 Mattermost versions 11.4.0 through 11.4.3
Description An issue exists where public/private permissions are not properly verified, allowing members who lack these permissions to access public playbooks through the '/get' endpoint.
Recommendations Update Mattermost versions 11.5.0 through 11.5.1 to a version newer than 11.5.1. Update Mattermost versions 10.11.0 through 10.11.13 to a version newer than 10.11.13. Update Mattermost versions 11.4.0 through 11.4.3 to a version newer than 11.4.3. As a temporary workaround, restrict access to the '/get' endpoint to minimize the risk of unauthorized playbook access.

Exploit

Fix

DoS

Incorrect Authorization

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Weakness Enumeration

CWE-863

Related Identifiers

CVE-2026-6343
GHSA-M79Q-8QF5-V622
GO-2026-5494
OPENSUSE-SU-2026:21483-1

Affected Products

Mattermost