CVE-2026-3514

In version 3.6.19 of prefecthq/prefect, an authentication bypass vulnerability exists due to the improper handling of URL path exemptions for health check probes. Specifically, the authentication middleware exempts any URL path ending with 'health' or 'ready' from authentication checks. This allows an attacker to create resources with names ending in 'health' or 'ready' and access them without authentication. Affected endpoints include those for variables, flows, work pools, work queues, and deployments. This vulnerability can lead to unauthorized access to sensitive information, such as API keys and database credentials, stored in Prefect Variables.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector : AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/prefecthq/prefect/commit/e21617125335025b4b27e7d6f0ca028e8e8f3b79	Patch
https://huntr.com/bounties/c540e5e1-f74f-44f4-bfa0-9764ff6daa75	Exploit Third Party Advisory
https://huntr.com/bounties/c540e5e1-f74f-44f4-bfa0-9764ff6daa75	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:prefect:prefect:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-06-02 09:16

Updated : 2026-07-22 19:10

NVD link : CVE-2026-3514

Mitre link : CVE-2026-3514

CVE.ORG link : CVE-2026-3514

JSON object : View

Products Affected

prefect

prefect

CWE

CWE-863

Incorrect Authorization

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