Improper Authentication in Crow - #VU147366
Published: September 8, 2026
Vulnerability identifier: #VU147366
CSH Severity: High
CVSS v4: 8.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-287
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass authentication and access protected WebSocket functionality.
The vulnerability exists due to improper authentication in the WebSocket upgrade branch of the connection request handler when processing a WebSocket upgrade request rejected by global authentication middleware. A remote attacker can send an unauthenticated WebSocket upgrade request to bypass authentication and access protected WebSocket functionality.
Affected software
Crow
Remediation
Install security update from vendor's website.
Crow - update to 1.3.4