CVE-2026-26304

Published: Mar 16, 2026

Modified: Mar 17, 2026

PUBLISHED

CVSS v3.1

4.3

MEDIUM

Description

Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2 fail to verify run_create permission for empty playbookId, which allows team members to create unauthorized runs via the playbook run API. Mattermost Advisory ID: MMSA-2025-00542

Vendor	Product	Versions
Mattermost	Mattermost	affected `11.3.0 - <= 11.3.0` affected `11.2.0 - <= 11.2.2` unaffected `11.4.0` unaffected `11.3.1` unaffected `11.2.3`

Weaknesses (CWE)

CWE-863

CVSS v3.1 Details

CVSS v3.1 Vector

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

References

MMSA-2025-00542

vendor-advisory

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CVE-2026-26304

Description

Affected Products

Weaknesses (CWE)

CVSS v3.1 Details

References