Description
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.
Published: 2026-09-29
Score: 9.3 Critical
EPSS: < 1% Very Low
KEV: No
Impact: Remote Code Execution
Action: Immediate Patch
AI Analysis

Impact

The LightLLM package up to version 1.2.0 offers a router profiler service that, when enabled, exposes an RPyC server without authentication and with pickle deserialization active. This configuration allows an attacker to send specially crafted serialized objects to the profiler command queue, which are executed on the host with the process permissions, leading to arbitrary code execution.

Affected Systems

ModelTC LightLLM is affected. Vulnerable releases include version 1.2.0 and any prior releases that still contain the unprotected profiler service.

Risk and Exploitability

The CVSS score of 9.3 classifies this vulnerability as critical. The EPSS score is not provided, and the vulnerability is not listed in the CISA KEV catalog. Attackers can exploit the flaw remotely by connecting to the RPyC server exposed when the --enable_profiling flag is used, sending malicious pickled payloads, and causing code to run with the service's privileges. Because authentication is missing, any network user with access to the service can carry out the attack.

Generated by OpenCVE AI on September 30, 2026 at 08:12 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Disable the --enable_profiling flag or remove the profiler service configuration to eliminate the unprotected RPyC endpoint.
  • Upgrade LightLLM to a patched release that removes or secures the profiler service and disables pickle deserialization.
  • If an upgrade is not immediately possible, restrict network access to the host running the LightLLM service, ensuring that only trusted internal hosts can reach the RPyC port and consider replacing pickle with a safer serialization method.

Generated by OpenCVE AI on September 30, 2026 at 08:12 UTC.

Tracking

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Advisories

No advisories yet.

History

Wed, 30 Sep 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Wed, 30 Sep 2026 00:30:00 +0000

Type Values Removed Values Added
First Time appeared Modeltc
Modeltc lightllm
Vendors & Products Modeltc
Modeltc lightllm

Tue, 29 Sep 2026 23:00:00 +0000

Type Values Removed Values Added
Description 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.
Title LightLLM through 1.2.0 Unauthenticated Remote Code Execution via Router Profiler RPyC Service
Weaknesses CWE-502
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 9.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Subscriptions

Modeltc Lightllm
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-09-30T13:59:15.479Z

Reserved: 2026-09-29T22:16:59.567Z

Link: CVE-2026-103040

cve-icon Vulnrichment

Updated: 2026-09-30T13:59:10.954Z

cve-icon NVD

Status : Deferred

Published: 2026-09-29T23:17:21.447

Modified: 2026-09-29T23:17:21.573

Link: CVE-2026-103040

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-30T08:15:17Z

Weaknesses
  • CWE-502

    Deserialization of Untrusted Data