PrefectHQ prefect WebSocket Endpoint in missing authentication

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Summary

CVECVE-2026-7723
StatePUBLISHED
AssignerVulDB
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-04 03:16:13 UTC
Updated2026-05-04 22:16:19 UTC
DescriptionA 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.

Risk And Classification

Primary CVSS: v4.0 5.5 MEDIUM from [email protected]

CVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS: 0.001150000 probability, percentile 0.296150000 (date 2026-05-05)

Problem Types: CWE-287 | CWE-306 | CWE-306 Missing Authentication | CWE-287 Improper Authentication

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary5.5MEDIUMCVSS: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/C...
4.0CNADECLARED6.9MEDIUMCVSS: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
3.1[email protected]Secondary7.3HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
3.1CNADECLARED7.3HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C
3.0CNADECLARED7.3HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C
2.0[email protected]Secondary7.5AV:N/AC:L/Au:N/C:P/I:P/A:P
2.0CNADECLARED7.5AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:OF/RC:C

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Confidentiality
Low
Integrity
Low
Availability
Low
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

CVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

CVSS v3.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA PrefectHQ Prefect affected 3.6.0 Not specified
CNA PrefectHQ Prefect affected 3.6.1 Not specified
CNA PrefectHQ Prefect affected 3.6.2 Not specified
CNA PrefectHQ Prefect affected 3.6.3 Not specified
CNA PrefectHQ Prefect affected 3.6.4 Not specified
CNA PrefectHQ Prefect affected 3.6.5 Not specified
CNA PrefectHQ Prefect affected 3.6.6 Not specified
CNA PrefectHQ Prefect affected 3.6.7 Not specified
CNA PrefectHQ Prefect affected 3.6.8 Not specified
CNA PrefectHQ Prefect affected 3.6.9 Not specified
CNA PrefectHQ Prefect affected 3.6.10 Not specified
CNA PrefectHQ Prefect affected 3.6.11 Not specified
CNA PrefectHQ Prefect affected 3.6.12 Not specified
CNA PrefectHQ Prefect affected 3.6.13 Not specified
CNA PrefectHQ Prefect unaffected 3.6.14 Not specified

References

ReferenceSourceLinkTags
vuldb.com/submit/807256 [email protected] vuldb.com
github.com/PrefectHQ/prefect/releases/tag/3.6.14 [email protected] github.com
vuldb.com/vuln/360899/cti [email protected] vuldb.com
gist.github.com/nedlir/f1ab8aa038aafbcc6beeef21fab1d74f [email protected] gist.github.com
github.com/PrefectHQ/prefect [email protected] github.com
github.com/PrefectHQ/prefect/pull/20372 [email protected] github.com
vuldb.com/vuln/360899 [email protected] vuldb.com
github.com/PrefectHQ/prefect/commit/f8afecadf88ea5f73694dafa3a365b9d8fae... [email protected] github.com
github.com/PrefectHQ/prefect/commit/0d3ab3c2d3f9f98abfafdf7b9f6d4f8ed392... MITRE github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: nedlir (VulDB User) (en)

CNA: VulDB CNA Team (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-05-03T00:00:00.000ZAdvisory disclosed
CNA2026-05-03T02:00:00.000ZVulDB entry created
CNA2026-05-04T23:22:28.000ZVulDB entry last update
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