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Description

A flaw has been found in PrefectHQ prefect up to 3.6.13. Affected is an unknown function of the file /api/events/in of the component WebSocket Endpoint. Executing a manipulation can lead to missing authentication. The attack may be performed from remote. The exploit has been published and may be used. Upgrading to version 3.6.14 is able to address this issue. This patch is called f8afecadf88ea5f73694dafa3a365b9d8fae1ad6. It is recommended to upgrade the affected component. 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:L/VA:L/SC:N/SI:N/SA:N/E:P
HIGH: 7.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C
HIGH: 7.3CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C
7.5AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:OF/RC:C

Problem types

Missing Authentication

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
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/360899 (VDB-360899 | PrefectHQ prefect WebSocket Endpoint in missing authentication) vdb-entry

vuldb.com/vuln/360899/cti (VDB-360899 | CTI Indicators (IOB, IOC, IOA)) signature permissions-required

vuldb.com/submit/807256 (Submit #807256 | PerfectHQ Perfect <=3.6.13 Missing Critical Step in Authentication) third-party-advisory

gist.github.com/nedlir/f1ab8aa038aafbcc6beeef21fab1d74f exploit

github.com/PrefectHQ/prefect/pull/20372 issue-tracking patch

github.com/...ommit/f8afecadf88ea5f73694dafa3a365b9d8fae1ad6 patch

github.com/PrefectHQ/prefect/releases/tag/3.6.14 patch

github.com/PrefectHQ/prefect/ product

cve.org (CVE-2026-7723)

nvd.nist.gov (CVE-2026-7723)

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