CVE-2026-108748Quarkus LangChain4j 1.9.0 through 1.14.1 Memory Exhaustion via /_chat/routes WebSocket
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- Weakness (CWE)
- CWE-401
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Awaiting Analysis
- Record last updated
- Oct 13, 2026
- First seen by InfoSec Signals
- Oct 11, 2026
Affected products
quarkiverse quarkus-langchain4j quarkiverse:quarkus_langchain4j (from the name) | from 1.9.0 through 1.14.1 | CNA record |
References
- https://hackmd.io/@haind/quarkus-langchain4j-chatscope-orphan-leakthird-party-advisory
- https://github.com/quarkiverse/quarkus-langchain4j/blob/658ac8268e1a453a6a2066952d9495fb925479e3/chat-scopes/websocket/runtime/src/main/java/io/quarkiverse/langchain4j/chatscopes/websocket/internal/ChatRouteEndpoint.java#L122-L160technical-description
- https://github.com/quarkiverse/quarkus-langchain4j/blob/658ac8268e1a453a6a2066952d9495fb925479e3/chat-scopes/core/runtime/src/main/java/io/quarkiverse/langchain4j/chatscopes/internal/ChatScopeManagedContext.java#L297-L311technical-description
- https://github.com/quarkiverse/quarkus-langchain4jproduct
- https://www.vulncheck.com/advisories/quarkus-langchain4j-1.9.0-through-1.14.1-memory-exhaustion-via-chat-routes-websocketthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.