Low 2.7Published Feb 19, 2026

CVE-2026-26964Windmill Exposes Workspace Slack OAuth Client Secrets to Non-Admin Workspace Members

Updated under an hour ago (Oct 27, 2026, 12:30 AM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for windmill-labs windmill

Exploited in the last 30 days

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: 2.7 LOW (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N
Weakness (CWE): CWE-200
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Feb 20, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

windmill-labs windmill windmill_labs:windmill (from the name)	before 1.635.0	CNA record
windmill windmill windmill:windmill	before 1.635.0	NVD

References

References

https://github.com/windmill-labs/windmill/security/advisories/GHSA-f27g-j463-q85w	x-refsource-confirm, exploit, vendor-advisory
https://github.com/windmill-labs/windmill/commit/43218c62852490d0efafa8f94385bfe0e8f2ad82	x-refsource-misc, patch
https://github.com/windmill-labs/windmill/releases/tag/v1.635.0	x-refsource-misc, product, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.