CVE-2026-5139

published 2026-06-22

CVE-2026-5139: Mattermost versions 11.7.x }} slash command.. Mattermost Advisory ID: MMSA-2026-00644

Priority P4 29 medium 5.4 CVSS 3.1

AV N AC L PR L UI N S U C N I L A L

Mattermost versions 11.7.x }} slash command.. Mattermost Advisory ID: MMSA-2026-00644

Affected

8 ranges

Vendor	Product	Version range	Fixed in
mattermost	mattermost	10.11.0 – 10.11.17	—
mattermost	mattermost	11.5.0 – 11.5.5	—
mattermost	mattermost	11.6.0 – 11.6.2	—
mattermost	mattermost	11.7.0 – 11.7.0	—
mattermost	mattermost_server	>= 10.11.0 < 10.11.18	10.11.18
mattermost	mattermost_server	>= 11.5.0 < 11.5.6	11.5.6
mattermost	mattermost_server	>= 11.6.0 < 11.6.3	11.6.3
mattermost	mattermost_server	>= 11.7.0 < 11.7.1	11.7.1

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CWE-862