Mattermost server
This hub aggregates every CVE we track for Mattermost server, a product in the communications space. Use it to gauge the current risk picture and drill into individual advisories.
467
CVEs tracked
17
Critical
64
High
0
In CISA KEV
Severity distribution
MEDIUM296LOW90HIGH64CRITICAL17
Monthly trend
4
4
4
7
6
7
13
9
7
3
9
6
6
10
10
2
8
32
4
32
15
13
12
0
2024-102026-09
Latest CVEs
The 15 most recently published vulnerabilities affecting Mattermost server.
- CVE-2026-9693Mattermost thread memberships persist after team removal, exposing private channel thread metadata on re-invite3.5
- CVE-2026-9859Mattermost Boards plugin didn’t enforce role-based authorization on board channel link allowing board editors to expose boards to arbitrary channels6.5
- CVE-2026-9816Insufficient server-side validation of board member role fields permits privilege escalation8.3
- CVE-2026-10080Boards plugin panics on WebSocket command with non-string field types6.5
- CVE-2026-10527Boards plugin retains Board Admin rights for users demoted to System Guest6.3
- CVE-2026-15754Missing per-channel team-scope check in ABAC access control policy unassign allows cross-team policy removal4.2
- CVE-2026-16044Insufficient validation of guest board admin privileges on archive import5.4
- CVE-2026-16045Delegated OAuth tokens could revoke unrelated OAuth application authorizations4.3
- CVE-2026-16047Board channel linking without read channel permission validation4.3
- CVE-2026-16046Missing run-state validation on finished playbook runs4.3
- CVE-2026-16048Channel member roles accept out-of-scope roles6.3
- CVE-2026-14298Boards archive import endpoint allows resource exhaustion via zip bomb and file size limit bypass in Mattermost6.5
- CVE-2026-7521SAML certificate deletion allows path traversal to delete arbitrary files outside the config directory5.5
- CVE-2026-10819Mattermost Server Denial of Service via Animated GIF Emoji Upload6.5
- CVE-2026-10600Denial of service via unbounded document content extraction in Mattermost Server4.3
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