CVE-2026-15754
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
Missing per-channel team-scope check in ABAC access control policy unassign allows cross-team policy removal
Mattermost versions 11.7.x <= 11.7.6, 11.8.x <= 11.8.3 The access control policy unassign endpoint fails to re-validate that each target channel still belongs to the requesting admin's team, which allows an authenticated team administrator to remove ABAC (attribute-based access control) policy assignments from channels outside their team via the policy unassign API after a channel has been moved to another team.. Mattermost Advisory ID: MMSA-2026-00718
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Mattermost
- Vendor
- Mattermost
- Product
- Mattermost
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 11.7.0 | affected | semver | Unavailable | 11.7.6 | None listed |
| 11.8.0 | affected | semver | Unavailable | 11.8.3 | None listed |
| 11.9.0 | unaffected | Unavailable | Unavailable | Unavailable | None listed |
| 11.7.7 | unaffected | Unavailable | Unavailable | Unavailable | None listed |
| 11.8.4 | unaffected | Unavailable | Unavailable | Unavailable | None listed |