CVE-2026-7722Medium· 5.3▾ SunlitPrefect Auth Bypass via endswith() Health Check Exemption
▾ Sunlit zone — Low / medium · no exploitation signal
impact 29.2 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Jul 13.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via OSV
0.5%
Last analysed / modified upstream
A vulnerability was detected in PrefectHQ prefect up to 3.6.21. This impacts the function endswith of the file /api/health of the component Health Check API. Performing a manipulation results in improper authentication. The attack is possible to be carried out remotely. The exploit is now public and may be used. Upgrading to version 3.6.22 will fix this issue. Upgrading the affected component is recommended.
prefect < 3.6.22Upgrade to a patched release:
prefect 3.6.22Connected by shared product, vendor, weakness, or advisory.
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CVE-2026-7723High· 7.3Prefect Unauthenticated Event Injection via /api/events/in WebSocket
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CVE-2026-3514High· 7.5Prefect has an Authentication Middleware Bypass when URL paths are appended with 'health' or 'ready'
CVE-2024-8183High· 7.6Prefect CORS (Cross-Origin Resource Sharing) misconfiguration