CVE-2026-9597
5.4
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Summary
Mattermost versions 11.7.x <= 11.7.2, 11.6.x <= 11.6.4 fail to verify whether a guest account is deactivated before creating a session in the magic-link token login path, which allows a deactivated guest user to obtain a fully functional session via a magic-link token issued prior to deactivation.. Mattermost Advisory ID: MMSA-2026-00681
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Mattermost | Mattermost | 11.7.0 <= 11.7.2 | affected |
| Mattermost | Mattermost | 11.6.0 <= 11.6.4 | affected |
| Mattermost | Mattermost | 11.8.0 | unaffected |
| Mattermost | Mattermost | 11.7.3 | unaffected |
| Mattermost | Mattermost | 11.6.5 | unaffected |
Weaknesses
- CWE-305: CWE-305 – Authentication Bypass by Primary Weakness
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: partial
References
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