What is CVE-2026-7723?

CVE-2026-7723 is a high-severity vulnerability in Prefecthq Prefect, classified under Improper Authentication. CVSS score: 7.3/10. Published 2026-05-04.

How severe is CVE-2026-7723?

High severity. CVSS v3 base score is 7.3 out of 10.

Auth bypass in Prefecthq Prefect

CVE-2026-7723

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.

Vulnerability class: Broken Authentication

Published 2026-05-04 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.007 (51.6th percentile), scored 2026-09-25.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 51.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.007 · change: +0.003

Affected products

Prefecthq Prefect — versions 3.6.0, 3.6.1, 3.6.2

Weakness classification (CWE)

References

vuldb.com/vuln/360899 (vdb-entry)
vuldb.com/vuln/360899/cti (signature, permissions-required)
vuldb.com/submit/807256 (third-party-advisory)
gist.github.com/nedlir/f1ab8aa038aafbcc6beeef21fab1d74f (exploit)
github.com/PrefectHQ/prefect/pull/20372 (issue-tracking, patch)
github.com/PrefectHQ/prefect/commit/0d3ab3c2d3f9f98abfafdf7b9f6d4f8ed3925e40 (patch)
github.com/PrefectHQ/prefect/releases/tag/3.6.14 (patch)
github.com/PrefectHQ/prefect/ (product)
github.com/PrefectHQ/prefect/commit/f8afecadf88ea5f73694dafa3a365b9d8fae1ad6 (patch)

Frequently asked questions

What is CVE-2026-7723?: CVE-2026-7723 is a high-severity vulnerability in Prefecthq Prefect, classified under Improper Authentication. CVSS score: 7.3/10. Published 2026-05-04.
How severe is CVE-2026-7723?: High severity. CVSS v3 base score is 7.3 out of 10.