Improper access control in Apache Tomcat - CVE-2026-76183
Published: September 23, 2026
Vulnerability identifier: #VU151847
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-76183
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass security constraints for WebSocket endpoints.
The vulnerability exists due to incorrect parsing of request paths as endpoint templates in WebSocket endpoint processing when processing a request for a WebSocket endpoint. A remote attacker can send a request with a crafted path to bypass security constraints for WebSocket endpoints.
Affected software
Apache Tomcat
How to mitigate CVE-2026-76183
Install security update from vendor's website.
Apache Tomcat - addressed in versions 9.0.122, 10.1.60, 11.0.26