CVE-2026-103041: critical vulnerability in ModelTC LightLLM
LightLLM through 1.2.0 Unauthenticated Remote Code Execution via Embed Cache RPyC Service
Published · Updated
28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.3epss 0.6%
exploitation probability
0.6%top 52% of all CVEs
observed exploitation
nono source reports it
LightLLM through 1.2.0 multimodal deployments expose an unauthenticated RPyC cache service with pickle deserialization enabled on all interfaces. Attackers can send crafted serialized objects to exposed cache methods to execute arbitrary code with service privileges.
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
Affected products
ModelTC · LightLLMRelated CVEs — ModelTC LightLLM
In the same product, most dangerous first.
CVE-2026-26220CRITICALLightLLM <= 1.1.0 PD Mode Unsafe Deserialization RCEEPSS 1.7%CVE-2026-90919CRITICALLightLLM through 1.2.0 Unauthenticated Remote Code Execution via Config Server Pickle DeserializationEPSS 1.1%CVE-2026-103040CRITICALLightLLM through 1.2.0 Unauthenticated Remote Code Execution via Router Profiler RPyC ServiceEPSS 0.8%CVE-2026-93839CRITICALLightLLM through 1.2.0 Missing Authentication in PD Master /pd_register WebSocket EndpointEPSS 0.8%CVE-2026-96560CRITICALLightLLM through 1.2.0 Unauthenticated Remote Code Execution via NCCL PD RPyC Control ChannelEPSS 0.7%CVE-2026-103395CRITICALLightLLM through 1.2.0 Unauthenticated Remote Code Execution via Visual-Only RPyC ServiceEPSS 0.6%
References
https://github.com/ModelTC/LightLLMhttps://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/embed_cache/manager.py#L29-L31https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/embed_cache/manager.py#L66https://github.com/ModelTC/LightLLM/issues/1596https://www.vulncheck.com/advisories/lightllm-through-1.2.0-unauthenticated-remote-code-execution-via-embed-cache-rpyc-service