CVE-2026-108748: Missing Release of Memory after Effective Lifetime in quarkiverse quarkus-langchain4j
Description
Quarkus LangChain4j versions 1.9.0 through 1.14.1 have a vulnerability where memory is not released after its effective lifetime in the chat-scopes WebSocket /_chat/routes endpoint. This allows unauthenticated remote attackers to exhaust server memory by sending repeated CONNECT frames with the same chatId, causing orphaned scopes to accumulate until the JVM exits, which degrades service availability.
CVSS v4.0
Score 6.9medium
Affected software
quarkiverse
quarkus-langchain4j
pkg:github/quarkus-langchain4jRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-108748 describes a missing release of memory vulnerability in quarkiverse quarkus-langchain4j versions 1.9.0 through 1.14.1. The flaw exists in the chat-scopes WebSocket /_chat/routes endpoint, where unauthenticated remote clients can send repeated CONNECT frames reusing a single chatId. This behavior leaves orphaned scopes in activeScopes that are not cleaned up until the JVM exits, leading to memory exhaustion and degraded availability of the server.
Potential Impact
The vulnerability allows unauthenticated remote attackers to cause a denial of service by exhausting server memory resources. This degrades the availability of the affected service until the JVM process is restarted. There is no indication of privilege escalation, data disclosure, or code execution.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, consider limiting access to the /_chat/routes WebSocket endpoint or implementing rate limiting to reduce the risk of memory exhaustion from repeated CONNECT frames.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-10-11T01:53:24.418Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6acb85c22cdf04f656d09a2c
Added to database: 10/11/2026, 12:49:06 UTC
Last enriched: 10/11/2026, 13:03:55 UTC
Last updated: 10/11/2026, 21:33:15 UTC
Views: 12
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