PT-2026-20970 · Windmill · Windmill

Byamb4 · Published 2026-02-19 · Updated 2026-02-20 · CVE-2026-26964

Positive Technologies (AI Summary)

CVSS v3.1

2.7

Low

Base vector

AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N

Name of the Vulnerable Software and Affected Versions Windmill versions 1.634.6 and below

Description Windmill is a developer platform for internal code, including 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 /api/w/{workspace}/workspaces/get settings API endpoint returns the slack oauth client secret to any authenticated workspace member, regardless of their admin status. The issue stems from a legacy implementation where the setting was stored as a plain value instead of using variable indirection, and it was not included in the redaction logic.

Recommendations Update to version 1.635.0 or later.

Exploit

Fix

Information Disclosure

Weakness Enumeration

CWE-200

Related Identifiers

CVE-2026-26964

GHSA-F27G-J463-Q85W

Affected Products

Windmill

References · 7

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/26xxx/CVE-2026-26964.json · Exploit
• https://github.com/windmill-labs/windmill/security/advisories/GHSA-f27g-j463-q85w · Vendor Advisory
• https://github.com/windmill-labs/windmill/commit/43218c62852490d0efafa8f94385bfe0e8f2ad82 · Patch
• https://osv.dev/vulnerability/CVE-2026-26964 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-26964 · Security Note
• https://github.com/windmill-labs/windmill/releases/tag/v1.635.0 · Note
• https://t.me/CVEtracker/45218 · Telegram Post