Signal is active with 2 mentions in latest observed window
Recommended action window: Monitor and triage in normal cycle
NVD description
Authentication Bypass by Alternate Name vulnerability in Apache Tomcat allowed the security constraints for any WebSocket endpoint to be bypassed. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.0.M1 through 9.0.121. The following versions were EOS at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100, from 7.0.43 through 7.0.109. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
NONE
Momentum
STABLE
Tomcatの脆弱性(Critical: CVE-2026-76183, CVE-2026-86248, CVE-2026-86350, High: CVE-2026-75973, CVE-2026-77762, CVE-2026-77791, CVE-2026-78383, CVE-2026-78437, CVE-2026-79677, CVE-2026-87022, Medium: CVE-2026-73581, Low: CVE-2026-77756) https://security.sios.jp/vulnerability/tomcat-security-vulnerability-20260924/
CVE-2026-76183 Apache Tomcat Authentication bypass could expose protected WebSocket endpoints on affected public-facing Tomcat servers Full analysis: https://github.com/alan-turing-institute/cyber-threat-observatory/blob/main/reports/2026-09-23/TIER_2_CVE-2026-76183.md #CyberSecurity #WebSecurity #VulnerabilityManagement
#schwachstellen Apache Tomcat: Kritische WebSocket-Lücke CVE-2026-76183 erlaubt Umgehung der Authentifizierung #apache #apachetomcat #cve202676183 #websocket https://cybersecurity-news.de/apache-tomcat-cve-2026-76183-websocket-authentifizierung-umgehung
🪣 Apache Tomcat CVE-2026-76183: critical 9.8 auth bypass lets attackers skip security constraints on ANY WebSocket endpoint. No auth, no interaction needed. Patch now if you're on Tomcat 11.0.0-M1+. #cybersecurity #ciso #cto #vulnerabilities #msp https://secalerts.co/vulnerability/CVE-2026-76183?utm_campaign=x https://t.co/0tLocBDGwn
🚨Critical - Apache Tomcat WebSocket Auth Bypass via Alternate Name (CVE-2026-76183) Apache Tomcat WebSocket security constraints can be bypassed when an endpoint is accessed via an alternate name, allowing attackers to reach protected WS endpoints without auth. Impacts constraint enforcement for WebSocket mappings across multiple branches. 👉Affected: Apache Tomcat 11.0.x, 10.1.x, 9.0.x, 8.5.x, 7.0.x | Upgrade to 11.0.26 / 10.1.60 / 9.0.122
CVE-2026-76183 Authentication Bypass by Alternate Name vulnerability in Apache Tomcat allowed the security constraints for any WebSocket endpoint to be bypassed. This issue affec… https://www.cve.org/CVERecord?id=CVE-2026-76183