CVE-2026-6334

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

Score
CVSS 3.1 3.8 Low
Status
Analyzed - responsibledisclosure@mattermost.com
Published
2026-05-18
Last modified
2026-10-14
Weaknesses
CWE-305

Affected products

References

 
 
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