---
title: "CVE-2026-103040: LightLLM - Remote Code Execution"
description: "LightLLM through 1.2.0 contains a remote code execution caused by unauthenticated RPyC server with pickle deserialization in the router profiler service, letting attackers execute arbitrary code remotely, exploit requires --enable_profiling flag enabled."
url: https://panop.io/threat-heartbeat/CVE-2026-103040/
---

# CVE-2026-103040 LightLLM - Remote Code Execution

LightLLM through 1.2.0 contains a remote code execution caused by unauthenticated RPyC server with pickle deserialization in the router profiler service, letting attackers execute arbitrary code remotely, exploit requires --enable\_profiling flag enabled.

CVSS base score 9.8 /10

Critical

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.78% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-103040)

## Details

Type

Remote Code Execution

Impact

Remote Code Execution

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Published

29 September 2026

Updated

15 October 2026

Weakness

[CWE-502](https://cwe.mitre.org/data/definitions/502.html)

## Vendor fix

Update to the latest version where this issue is fixed.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-103040](https://nvd.nist.gov/vuln/detail/CVE-2026-103040)
- [https://github.com/ModelTC/LightLLM](https://github.com/ModelTC/LightLLM)
- [https://github.com/ModelTC/LightLLM/issues/1597](https://github.com/ModelTC/LightLLM/issues/1597)
- [https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/router/profiler\_service.py#L32-L34](https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/router/profiler_service.py#L32-L34)
- [https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/router/profiler\_service.py#L46-L50](https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/router/profiler_service.py#L46-L50)
- [https://www.vulncheck.com/advisories/lightllm-through-1.2.0-unauthenticated-remote-code-execution-via-router-profiler-rpyc-service](https://www.vulncheck.com/advisories/lightllm-through-1.2.0-unauthenticated-remote-code-execution-via-router-profiler-rpyc-service)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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