Is CVE-2026-3514 actively exploited?

No active exploitation of CVE-2026-3514 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-3514 be exploited remotely?

Yes. CVE-2026-3514 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-3514?

CVE-2026-3514 has a CVSS score of 7.5 (HIGH).

HOME VULNERABILITIESCVE-2026-3514

HIGH

CVE-2026-3514

CWE-863Published: June 2, 2026· Updated: Jun 3, 2026

7.5

CVSS v3.1

EPSS:0.08%probability of exploitation in 30 daysPercentile:23.5th

Official Description

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.

NVD Source

Technical Analysis

CVE-2026-3514 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 7.5.