MEDIUM5.3
PYSEC-2026-2956
Prefect Auth Bypass via endswith() Health Check Exemption
Quick fix
PYSEC-2026-2956 — prefect: upgrade to the fixed version with the command below.
pip install --upgrade 'prefect>=3.6.22'Details
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.
Are you affected?
Enter the version of the package you're using.
Affected packages
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-7722[ADVISORY]
- https://github.com/PrefectHQ/prefect/pull/21063[WEB]
- https://github.com/PrefectHQ/prefect/pull/21063/changes/d8c4ff97ef7c0a940925d32b2d76324c8def42de[WEB]
- https://github.com/PrefectHQ/prefect/commit/e21617125335025b4b27e7d6f0ca028e8e8f3b79[WEB]
- https://gist.github.com/nedlir/f576abbb0e491dc9bb7e106c140dda04[WEB]
- https://github.com/PrefectHQ/prefect[PACKAGE]
- https://github.com/PrefectHQ/prefect/releases/tag/3.6.22[WEB]
- https://vuldb.com/submit/807255[WEB]
- https://vuldb.com/vuln/360898[WEB]
- https://vuldb.com/vuln/360898/cti[WEB]
- https://pypi.org/project/prefect[PACKAGE]
- https://github.com/advisories/GHSA-6rr6-v7cj-mxpg[ADVISORY]