CVE-2026-6334
3.1
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:N
Summary
Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13 fail to enforce client identity binding during the OAuth authorization code redemption flow which allows an authenticated OAuth client to redeem authorization codes issued to a different client via a crafted token exchange request.. Mattermost Advisory ID: MMSA-2026-00570
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Mattermost | Mattermost | 11.5.0 <= 11.5.1 | affected |
| Mattermost | Mattermost | 10.11.0 <= 10.11.13 | affected |
| Mattermost | Mattermost | 11.6.0 | unaffected |
| Mattermost | Mattermost | 11.5.2 | unaffected |
| Mattermost | Mattermost | 10.11.14 | 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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