gcdRadar
archive/Patch now/AIR-2026-0291
closedclosed 11 Oct 2026Patch now2 Disclosed vulnerabilityAI

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

Quarkus LangChain4j

Quarkus LangChain4j contains a missing release of memory vulnerability in its WebSocket chat-scopes route allowing unauthenticated clients to exhaust server memory. The issue affects versions 1.9.0 through 1.14.1.

disclosed CVENo confirmed exploitation, so this record is tracked as a disclosed vulnerability and not counted as an incident. It moves into the counts if CISA or the vendor confirms exploitation. Why

CVSS
6.9
EPSS
<0.01 · top 70% · 2026-11-13
EPSS scores by FIRST
fix status
Fix status unknown
first report
11 Oct 2026
last update
11 Oct 2026
CVE ids
CVE-2026-108748other records

Timeline · 1

  1. 11 Oct 2026CVE-2026-108748: Quarkus LangChain4j 1.9.0 through 1.14.1 contains a missing release of memory vulnerability in the chat-scopes WebSocket…

Sources · 1

Advisories and databases

  1. 2026-10-11
    CVE-2026-108748: Quarkus LangChain4j 1.9.0 through 1.14.1 contains a missing release of memory vulnerability in the chat-scopes WebSocket…
    NVD · nvd.nist.gov/vuln/detail/CVE-2026-108748

Titles and links belong to their publishers. The summary above is written by gcdRadar in its own words; data is CC BY-SA 4.0.

Classification

lane
Patch now
AI role
Attack on AI
categories
Infrastructure vulnerability
severity
2 · Disclosed vulnerability
fix status
Fix status unknown
targets
Framework / tooling
owasp llm top 10
LLM03:2025 Supply Chain
mitre atlas
no technique for these categories
tags
langchain4jdenial-of-service
dates
happened 11 Oct 2026 · first reported 11 Oct 2026
origin
NVD
Vulnerability record from NVD / the GitHub Advisory Database. This product uses the NVD API but is not endorsed or certified by the NVD.
record
confidence 0.95 · created 2026-10-18 06:33Z · updated 2026-10-18 06:33Z

Lane, AI role, categories and severity come from the classifier; the OWASP and ATLAS rows are derived from the categories. How these are assigned

Copy a brief

This record as a short Markdown brief, for a ticket, a chat or a coding agent.

the brief as text
# CVE-2026-108748: Memory exhaustion in Quarkus LangChain4j chat-scopes WebSocket

https://gcdradar.vercel.app/incidents/cve-2026-108748-memory-exhaustion-in-quarkus-langchain4j-cha · AIR-2026-0291 · closed 2026-10-11

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-10-11
- AI role: Attack on AI
- Products: Quarkus LangChain4j
- CVE ids: CVE-2026-108748
- CVSS: 6.9

## Summary

Quarkus LangChain4j contains a missing release of memory vulnerability in its WebSocket chat-scopes route allowing unauthenticated clients to exhaust server memory. The issue affects versions 1.9.0 through 1.14.1.

## What to do

No action recorded; read the sources below and the vendor's advisory.

## Latest updates

- 2026-10-11: CVE-2026-108748: Quarkus LangChain4j 1.9.0 through 1.14.1 contains a missing release of memory vulnerability in the chat-scopes WebSocket… (https://nvd.nist.gov/vuln/detail/CVE-2026-108748)

## Sources

- 2026-10-11 NVD: CVE-2026-108748: Quarkus LangChain4j 1.9.0 through 1.14.1 contains a missing release of memory vulnerability in the chat-scopes WebSocket… https://nvd.nist.gov/vuln/detail/CVE-2026-108748

Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.

Related

  1. closed
    Microsoft 365 Agents SDK CVE-2026-109485 Microsoft 365 Agents SDK Information Disclosure Vulnerability

    Patch now · Disclosed · since 10 Nov 2026 · CVE-2026-109485

    AI
  2. live
    SGLang SGLang RCE Exploit Breaches NEAR AI, Steals Data From 18 Agents

    Breaches & attacks · Exploited · since 8 Nov 2026

    AI
  3. closed6.5
    MCP servers & tools CVE-2026-125321: pgEdge Postgres MCP Server rate‑limit bypass via X‑Forwarded‑For

    Patch now · Disclosed · Patched · since 10 Nov 2026 · CVE-2026-125321

    AI
  4. closed5.3
    MCP servers & tools CVE-2026-125320: pgEdge Postgres MCP Server vulnerable to DNS rebinding via Origin header

    Patch now · Disclosed · Patched · since 10 Nov 2026 · CVE-2026-125320

    AI
  5. closed6.5
    MCP servers & tools CVE-2026-125322: pgEdge Postgres MCP Server allows subquery inference via count_rows tool

    Patch now · Disclosed · Patched · since 10 Nov 2026 · CVE-2026-125322

    AI
  6. closed8.8
    SandboxShellTool CVE-2026-113663: SandboxShellTool newline injection bypasses allowlist, enabling arbitrary command execution

    Patch now · Disclosed · since 10 Nov 2026 · CVE-2026-113663

    AI