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CVE-2026-3514GHSA-C635-393C-HCX2PYSEC-2026-2261

Authentication Bypass in prefecthq/prefect

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 3.6.22, 3.6.22.dev7
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: poc
  • Automatable: yes
  • Technical impact: partial

Summary

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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: poc · Automatable: yes · Technical impact: partial

  3. Record last updated

Affected versions

  • prefecthq prefecthq/prefect

    fixed in 3.6.22

  • prefectPyPI

    fixed in 3.6.22.dev7

  • prefectPyPI

    fixed in 3.6.22

References 2

huntr.com

GitHub · prefecthq/prefect