Vulnerability Description
In version 3.6.19 of prefecthq/prefect, an authentication bypass vulnerability exists due to the improper handling of URL path exemptions for health check probes. Specifically, the authentication middleware exempts any URL path ending with 'health' or 'ready' from authentication checks. This allows an attacker to create resources with names ending in 'health' or 'ready' and access them without authentication. Affected endpoints include those for variables, flows, work pools, work queues, and deployments. This vulnerability can lead to unauthorized access to sensitive information, such as API keys and database credentials, stored in Prefect Variables.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Prefect | Prefect | < 3.6.22 |
Related Weaknesses (CWE)
References
- https://github.com/prefecthq/prefect/commit/e21617125335025b4b27e7d6f0ca028e8e8fPatch
- https://huntr.com/bounties/c540e5e1-f74f-44f4-bfa0-9764ff6daa75ExploitThird Party Advisory
- https://huntr.com/bounties/c540e5e1-f74f-44f4-bfa0-9764ff6daa75ExploitThird Party Advisory
FAQ
What is CVE-2026-3514?
CVE-2026-3514 is a vulnerability with a CVSS score of 7.5 (HIGH). In version 3.6.19 of prefecthq/prefect, an authentication bypass vulnerability exists due to the improper handling of URL path exemptions for health check probes. Specifically, the authentication midd...
How severe is CVE-2026-3514?
CVE-2026-3514 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-3514?
Check the references section above for vendor advisories and patch information. Affected products include: Prefect Prefect.