Quarkus LangChain4j 1.9.0 through 1.14.1 contains a missing release of memory vulnerability in the chat-scopes WebSocket /_chat/routes endpoint that allows unauthenticated remote clients to exhaust server memory. Attackers can send repeated CONNECT frames reusing one chatId, leaving orphaned scopes in activeScopes until the JVM exits and degrading availability.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
Low
Partial disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 5
https://github.com/quarkiverse/quarkus-langchain4j
disclosure@vulncheck.com
https://github.com/quarkiverse/quarkus-langchain4j/blob/658ac8268e1a453a6a20669…
disclosure@vulncheck.com
https://github.com/quarkiverse/quarkus-langchain4j/blob/658ac8268e1a453a6a20669…
disclosure@vulncheck.com
https://hackmd.io/@haind/quarkus-langchain4j-chatscope-orphan-leak
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/quarkus-langchain4j-1.9.0-through-1.14.1-m…
disclosure@vulncheck.com