Advisoriesby IbisPrefectGHSA-6rr6-v7cj-mxpg
Prefect Auth Bypass via endswith() Health Check Exemption
Fix: upgrade to 3.6.22 or later
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.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| prefect PyPI | < 3.6.22 | 3.6.22 |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- Severity from
- GitHub (reviewed advisory)
- Weakness
- CWE-287
- Also known as
- CVE-2026-7722, PYSEC-2026-2956
- nvd.nist.gov/vuln/detail/CVE-2026-7722
- github.com/PrefectHQ/prefect/pull/21063
- github.com/PrefectHQ/prefect/pull/21063/changes/d8c4ff97ef7c0a940925d32b2d76324c8def42de
- github.com/PrefectHQ/prefect/commit/e21617125335025b4b27e7d6f0ca028e8e8f3b79
- gist.github.com/nedlir/f576abbb0e491dc9bb7e106c140dda04
- github.com/PrefectHQ/prefect
- github.com/PrefectHQ/prefect/releases/tag/3.6.22
- vuldb.com/submit/807255
- vuldb.com/vuln/360898
- vuldb.com/vuln/360898/cti
More Prefect advisories
All Prefect
Prefect: remote code executionCVE-2026-5366fixed in 3.6.25Prefect has an Authentication Middleware Bypass when URL paths are appended with 'health' or 'ready'CVE-2026-3514fixed in 3.6.22.dev7Prefect has an Argument Injection issueCVE-2026-3515no fix yetPrefect Git Argument Injection in GitRepository Pull StepsCVE-2026-7725fixed in 3.6.25.dev7Prefect Unauthenticated Event Injection via /api/events/in WebSocketCVE-2026-7723fixed in 3.6.14Prefect SSRF Bypass via DNS Rebinding in validate_restricted_urlCVE-2026-7724fixed in 3.6.28.dev2