---
id: CVE-2026-103040
title: >-
  LightLLM through 1.2.0 contains a remote code execution vulnerability in the
  router profiler service when started with --enable_profiling flag
summary: >-
  LightLLM through 1.2.0 contains a remote code execution vulnerability in the
  router profiler service when started with --enable_profiling flag. The service
  exposes an unauthenticated RPyC server with pickle deserialization enabled,
  allow…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-502
vendor: ModelTC
product: LightLLM
affected:
  - LightLLM <= 1.2.0
published: '2026-09-29'
updated: '2026-09-29'
sourceUpdated: '2026-09-29T23:17:21.573'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-103040'
references:
  - url: 'https://github.com/ModelTC/LightLLM'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/ModelTC/LightLLM/issues/1597'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/router/profiler_service.py#L32-L34
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/router/profiler_service.py#L46-L50
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/lightllm-through-1.2.0-unauthenticated-remote-code-execution-via-router-profiler-rpyc-service
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-29T23:52:50.534Z'
---

## Overview

LightLLM through 1.2.0 contains a remote code execution vulnerability in the router profiler service when started with --enable_profiling flag. The service exposes an unauthenticated RPyC server with pickle deserialization enabled, allowing attackers to execute arbitrary code by sending crafted serialized objects to the profiler command queue.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.