{"id":"CVE-2026-96560","summary":"LightLLM through 1.2.0 Unauthenticated Remote Code Execution via NCCL PD RPyC Control Channel","details":"LightLLM through 1.2.0 contains a remote code execution vulnerability in the KV-transfer worker when started with --pd_trans_mode nccl, which exposes an unauthenticated RPyC control channel that deserializes attacker-supplied data. Attackers can send malicious pickled objects to the exposed RPyC ThreadedServer to execute arbitrary code with the privileges of the LightLLM service account.","modified":"2026-09-25T03:48:28.959531935Z","published":"2026-09-23T13:32:38.336Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-502"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/96xxx/CVE-2026-96560.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/96xxx/CVE-2026-96560.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-96560"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/lightllm-through-1.2.0-unauthenticated-remote-code-execution-via-nccl-pd-rpyc-control-channel"},{"type":"REPORT","url":"https://github.com/ModelTC/LightLLM/issues/1590"},{"type":"PACKAGE","url":"https://github.com/ModelTC/lightllm"},{"type":"ARTICLE","url":"https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/router/model_infer/mode_backend/pd/kv_transporter.py#L20-L36"},{"type":"ARTICLE","url":"https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/router/model_infer/mode_backend/pd/nccl_kv_transporter.py#L247-L249"},{"type":"ARTICLE","url":"https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/router/model_infer/mode_backend/pd/nccl_kv_transporter.py#L411-L415"},{"type":"ARTICLE","url":"https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/router/model_infer/mode_backend/pd/nccl_kv_transporter.py#L437-L461"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/modeltc/lightllm","events":[{"introduced":"0"},{"fixed":"65c174ee95ac6a6fd36b18b63d0b33d97e76b770"}],"database_specific":{"source":["AFFECTED_FIELD","DESCRIPTION"],"extracted_events":[{"introduced":"0"},{"last_affected":"1.2.0"},{"fixed":"1.2.0"}]}}],"versions":["v1.1.0","v1.0.1","v1.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-96560.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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"}]}