Critical severity · published Sep 29, 2026
CVE-2026-103040
LightLLM through 1.2.0 Unauthenticated Remote Code Execution via Router Profiler RPyC Service
9.8
CVSS
1%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.0% · higher than 63% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
LightLLM · ModelTC
through 1.2.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-103040
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-103040
issue-tracking
https://github.com/ModelTC/LightLLM/issues/1597
technical-description
https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/router/profiler_service.py#L32-L34
technical-description
https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/router/profiler_service.py#L46-L50
product
https://github.com/ModelTC/LightLLM
third-party-advisory
https://www.vulncheck.com/advisories/lightllm-through-1.2.0-unauthenticated-remote-code-execution-via-router-profiler-rpyc-service
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