High severity · published May 4, 2026
CVE-2026-7723
PrefectHQ prefect WebSocket Endpoint in missing authentication
7.3
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 36% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PR
prefect · PrefectHQ
3.6.0; 3.6.1; 3.6.2; 3.6.3; 3.6.4; 3.6.5; +8 more · source: vendor
Affected product
PR
prefect
PrefectHQ
More from prefect
9.9
CVE-2026-5366
Git Argument Injection in prefecthq/prefect
8.8
CVE-2023-6022
Cross-Site Request Forgery (CSRF) in GitHub repository prefecthq/prefect prior to 2.16.5
7.5
CVE-2026-3514
Authentication Bypass in prefecthq/prefect
6.3
CVE-2026-7725
PrefectHQ prefect GitRepository Pull storage.py argument injection
5.3
CVE-2026-7722
PrefectHQ prefect Health Check API health endswith improper authentication