CVE-2026-7722

PrefectHQ prefect Health Check API health endswith improper authentication

State: Published
Severity: 6.9 Medium
Published: May 4, 2026
Updated: May 4, 2026
Reserved: May 3, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	6.9 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P	VulDB
3.1	5.3 Medium	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	VulDB
3.0	5.3 Medium	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C	VulDB
2.0	5.0 Medium	AV:N/AC:L/Au:N/C:P/I:N/A:N/E:POC/RL:OF/RC:C	VulDB

Weaknesses

CWE-287 Improper Authentication

Affected Products

Product	Versions
prefectPrefectHQ	3.6.0Affected 3.6.1Affected 3.6.2Affected 3.6.3Affected 3.6.4Affected 3.6.5Affected 3.6.6Affected 3.6.7Affected 3.6.8Affected 3.6.9Affected 3.6.10Affected 3.6.11Affected 3.6.12Affected 3.6.13Affected 3.6.14Affected 3.6.15Affected 3.6.16Affected 3.6.17Affected 3.6.18Affected 3.6.19Affected 3.6.20Affected 3.6.21Affected 3.6.22Not affected

References

VDB-360898 | PrefectHQ prefect Health Check API health endswith improper authenticationvdb-entrytechnical-description
VDB-360898 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
Submit #807255 | PrefectHQ Perfect <=3.6.21 Improper Authenticationthird-party-advisory
https://gist.github.com/nedlir/f576abbb0e491dc9bb7e106c140dda04exploit
https://github.com/PrefectHQ/prefect/pull/21063issue-trackingpatch
https://github.com/PrefectHQ/prefect/commit/e21617125335025b4b27e7d6f0ca028e8e8f3b79patch
https://github.com/PrefectHQ/prefect/releases/tag/3.6.22patch
https://github.com/PrefectHQ/prefect/product

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