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Vulnerability · Published May 4, 2026 · Assigned by VulDB

CVE-2026-7722PrefectHQ prefect Health Check API health endswith improper authentication

Medium 5.3

In plain English

A medium-severity improper authentication in prefect from PrefectHQ. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.5%top 60.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official description

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. The patch is named e21617125335025b4b27e7d6f0ca028e8e8f3b79. Upgrading the affected component is recommended. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
PyPIprefect3.6.22GHSA-6rr6-v7cj-mxpg
PyPIprefect3.6.22PYSEC-2026-2956

Affected products (as reported)

VendorProductVersions
PrefectHQ prefect 3.6.03.6.13.6.23.6.33.6.43.6.53.6.63.6.7

Weakness: CWE-287 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C

References