What is CVE-2026-26964?

CVE-2026-26964 is a low-severity vulnerability in Windmill-labs Windmill, classified under Information Disclosure. CVSS score: 2.7/10. Published 2026-02-19.

How severe is CVE-2026-26964?

Low severity. CVSS v3 base score is 2.7 out of 10.

Information disclosure in Windmill-labs Windmill

CVE-2026-26964

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…

Vulnerability class: Information Disclosure

EPSS: 0.001 (19.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 2.7 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N.

Affected products

Windmill-labs Windmill — versions < 1.635.0

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

https://github.com/windmill-labs/windmill/security/advisories/GHSA-f27g-j463-q85w (x_refsource_CONFIRM)
https://github.com/windmill-labs/windmill/commit/43218c62852490d0efafa8f94385bfe0e8f2ad82 (x_refsource_MISC)
https://github.com/windmill-labs/windmill/releases/tag/v1.635.0 (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-26964?: CVE-2026-26964 is a low-severity vulnerability in Windmill-labs Windmill, classified under Information Disclosure. CVSS score: 2.7/10. Published 2026-02-19.
How severe is CVE-2026-26964?: Low severity. CVSS v3 base score is 2.7 out of 10.