Vulnerability Description
Windmill is an open-source developer platform for internal code: APIs, background jobs, workflows and UIs. Versions 1.634.6 and below allow non-admin users to obtain Slack OAuth client secrets, which should only be accessible to workspace administrators. The GET /api/w/{workspace}/workspaces/get_settings endpoint returns the slack_oauth_client_secret to any authenticated workspace member, regardless of their admin status. It is expected behavior for non-admin users see a redacted version of workspace settings, as some of them are necessary for the frontend to behave correctly even for non-admins. However, the Slack configuration should not be visible to non-admins. This is a legacy issue where the setting was stored as a plain value instead of using $variable indirection, and it was never added to the redaction logic. This issue has been fixed in version 1.635.0.
CVSS Score
LOW
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Windmill | Windmill | < 1.635.0 |
Related Weaknesses (CWE)
References
- https://github.com/windmill-labs/windmill/commit/43218c62852490d0efafa8f94385bfePatch
- https://github.com/windmill-labs/windmill/releases/tag/v1.635.0ProductRelease Notes
- https://github.com/windmill-labs/windmill/security/advisories/GHSA-f27g-j463-q85ExploitVendor Advisory
FAQ
What is CVE-2026-26964?
CVE-2026-26964 is a vulnerability with a CVSS score of 2.7 (LOW). Windmill is an open-source developer platform for internal code: APIs, background jobs, workflows and UIs. Versions 1.634.6 and below allow non-admin users to obtain Slack OAuth client secrets, which...
How severe is CVE-2026-26964?
CVE-2026-26964 has been rated LOW with a CVSS base score of 2.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-26964?
Check the references section above for vendor advisories and patch information. Affected products include: Windmill Windmill.