medium6.8
CVE-2026-9699
Mattermost Plugins versions <=11.6 10.18.11 11.3.6 11.6.5.0 fail to sanitize error responses from the OpenAI API before logging, which allows a user with acces…
Impact
Mattermost Plugins versions <=11.6 10.18.11 11.3.6 11.6.5.0 fail to sanitize error responses from the OpenAI API before logging, which allows a user with access to server logs or support packets to obtain a valid or partially reconstructable OpenAI API key via inspection of mattermost.log entries generated during authentication failures. Mattermost Advisory ID: MMSA-2026-00609
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Mattermost | Mattermost Plugins | through 11.6 |
Versions were read from the advisory text. No structured product data has been published for this record yet.