MediumVulnerability

CVE-2026-108748: Quarkus LangChain4j memory exhaustion in chat-scopes WebSocket

Source: NVD(opens in a new tab)
Identifier: CVE-2026-108748
Published: October 11, 2026
Record updated: October 11, 2026

Known exploitation: Not listed in the CISA Known Exploited Vulnerabilities catalog at the last check.

Summary

Quarkus LangChain4j versions 1.9.0 through 1.14.1 contain a missing-release-of-memory flaw in the chat-scopes WebSocket /_chat/routes endpoint. Unauthenticated remote clients can send repeated CONNECT frames reusing one chatId, leaving orphaned scopes in activeScopes until the JVM exits and degrading availability.

Mitigation

The source does not state a fix yet. Check the original advisory for updates.

Details

Scores and exploitation

CVSS score: 5.3(medium)
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack vector: network
Attack complexity: low
Privileges required: none
User interaction: none
EPSS: Not scored. FIRST had not published an EPSS score for this CVE when it was last checked on October 11, 2026.
Disclosure date: October 11, 2026

Weaknesses and techniques

Weakness (CWE): CWE-401

Classification

Attack type: Denial of service
Attack sophistication: Trivial
AI component targeted: Framework
Impact: Availability
Labels: security

How this record was produced

Summaries, mitigations and labels on this page are generated automatically from the source. The linked source is authoritative. The source gives this advisory a description and no title, so the title above is a headline generated from the source text.

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-108748

First tracked: October 11, 2026 at 10:07 AM ET, from NVD/CVE Database

Classifier: claude-haiku-5-5, prompt v4

Classifier confidence: 90% (self-assessed)

Summary

Mitigation

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