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CVE PROGRAM SOURCE RECORD6.8 Medium

CVE-2026-9699

Mattermost Agents plugin logs unsanitized OpenAI API keys on authentication errors

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Status
Published
Published
Updated
Assigning organization
Mattermost

Description

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

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Mattermost Mattermost

Default version status: unaffected

  • 0 to ≤ 10.18.11affected
  • 0 to ≤ 11.3.6affected
  • 0 to ≤ 11.6.5affected
  • 11.7.0unaffected
  • 10.11.19unaffected
  • 11.6.4unaffected
  • 11.5.7unaffected

References