Vulnerability · Published May 4, 2026 · Assigned by VulDB
CVE-2026-7723PrefectHQ prefect WebSocket Endpoint in missing authentication
High 7.3
In plain English
A high-severity missing authentication in prefect from PrefectHQ. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | prefect | 3.6.14 | GHSA-hvph-5985-r63v |
| PyPI | prefect | 3.6.14 | PYSEC-2026-2958 |
Affected products (as reported)
Weakness: CWE-306, CWE-287 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C
References
- VDB-360899 | PrefectHQ prefect WebSocket Endpoint in missing authentication vdb-entry
- VDB-360899 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- Submit #807256 | PerfectHQ Perfect <=3.6.13 Missing Critical Step in Authentication third-party-advisory
- https://gist.github.com/nedlir/f1ab8aa038aafbcc6beeef21fab1d74f exploit
- https://github.com/PrefectHQ/prefect/pull/20372 issue-tracking, patch
- https://github.com/PrefectHQ/prefect/commit/f8afecadf88ea5f73694dafa3a365b9d8fae1ad6 patch
- https://github.com/PrefectHQ/prefect/releases/tag/3.6.14 patch
- https://github.com/PrefectHQ/prefect/ product