CVE-2026-103040

CRITICAL 9.8

LightLLM through 1.2.0 Unauthenticated Remote Code Execution via Router Profiler RPyC Service

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-502
Vendor	modeltc
Product	lightllm
Published	Sep 29, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

ModelTC / LightLLM

0 ≤ 1.2.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/ModelTC/LightLLM/issues/1597 github.com: https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/router/profiler_service.py#L32-L34 github.com: https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/router/profiler_service.py#L46-L50 github.com: https://github.com/ModelTC/LightLLM vulncheck.com: https://www.vulncheck.com/advisories/lightllm-through-1.2.0-unauthenticated-remote-code-execution-via-router-profiler-rpyc-service

Credits

Mingkai Yu Jiapeng Li Jiajia Liu