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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.

PUBLISHED Reserved 2026-05-03 | Published 2026-05-04 | Updated 2026-05-04 | Assigner VulDB




MEDIUM: 6.9CVSS: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
MEDIUM: 5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C
MEDIUM: 5.3CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C
5.0AV:N/AC:L/Au:N/C:P/I:N/A:N/E:POC/RL:OF/RC:C

Problem types

Improper Authentication

Product status

3.6.0
affected

3.6.1
affected

3.6.2
affected

3.6.3
affected

3.6.4
affected

3.6.5
affected

3.6.6
affected

3.6.7
affected

3.6.8
affected

3.6.9
affected

3.6.10
affected

3.6.11
affected

3.6.12
affected

3.6.13
affected

3.6.14
affected

3.6.15
affected

3.6.16
affected

3.6.17
affected

3.6.18
affected

3.6.19
affected

3.6.20
affected

3.6.21
affected

3.6.22
unaffected

Timeline

2026-05-03:Advisory disclosed
2026-05-03:VulDB entry created
2026-05-04:VulDB entry last update

Credits

nedlir (VulDB User) reporter

VulDB CNA Team coordinator

References

vuldb.com/vuln/360898 (VDB-360898 | PrefectHQ prefect Health Check API health endswith improper authentication) vdb-entry technical-description

vuldb.com/vuln/360898/cti (VDB-360898 | CTI Indicators (IOB, IOC, IOA)) signature permissions-required

vuldb.com/submit/807255 (Submit #807255 | PrefectHQ Perfect <=3.6.21 Improper Authentication) third-party-advisory

gist.github.com/nedlir/f576abbb0e491dc9bb7e106c140dda04 exploit

github.com/PrefectHQ/prefect/pull/21063 issue-tracking patch

github.com/...ommit/e21617125335025b4b27e7d6f0ca028e8e8f3b79 patch

github.com/PrefectHQ/prefect/releases/tag/3.6.22 patch

github.com/PrefectHQ/prefect/ product

cve.org (CVE-2026-7722)

nvd.nist.gov (CVE-2026-7722)

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