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CVE-2026-76183 is an important-severity authentication bypass in Apache Tomcat's handling of WebSocket endpoint request paths. Tomcat parses request paths as endpoint templates in a manner that permits an alternate name for a WebSocket endpoint to evade the security constraints configured for that endpoint. The issue affects Tomcat 11.0.0-M1 through 11.0.25, 10.1.0-M1 through 10.1.59, and 9.0.0-M1 through 9.0.121. End-of-life 8.5.0 through 8.5.100 and 7.0.43 through 7.0.109 are also known to be affected; other unsupported releases may be affected.
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No public exploit code observed for this vulnerability.
13 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A WebSocket authorization-bypass vulnerability caused by treating request paths as endpoint templates.
An Important Apache Tomcat WebSocket authorization-bypass vulnerability resulting from request paths being parsed as endpoint templates.
An authentication-bypass vulnerability in Apache Tomcat that allows security constraints on WebSocket endpoints to be bypassed through an alternate name.
Apache Tomcat authentication-bypass vulnerability allowing WebSocket endpoint security constraints to be bypassed through an alternate name.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.