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CVE

CVE-2026-96560

LightLLM through 1.2.0 Unauthenticated Remote Code Execution via NCCL PD RPyC Control Channel
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CVE

CVE-2026-96560

LightLLM through 1.2.0 Unauthenticated Remote Code Execution via NCCL PD RPyC Control Channel

LightLLM through 1.2.0 contains a remote code execution vulnerability in the KV-transfer worker when started with --pdtransmode 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.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.3
-
4.0
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
C
H
U
0
-
C
H
U
-

Related Resources

No items found.

References

https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/96xxx/CVE-2026-96560.json, https://nvd.nist.gov/vuln/detail/CVE-2026-96560, https://www.vulncheck.com/advisories/lightllm-through-1.2.0-unauthenticated-remote-code-execution-via-nccl-pd-rpyc-control-channel, https://github.com/ModelTC/LightLLM/issues/1590, https://github.com/ModelTC/lightllm, https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/router/modelinfer/modebackend/pd/kvtransporter.py#L20-L36, https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/router/modelinfer/modebackend/pd/ncclkvtransporter.py#L247-L249, https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/router/modelinfer/modebackend/pd/ncclkvtransporter.py#L411-L415, https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/router/modelinfer/modebackend/pd/ncclkv_transporter.py#L437-L461

Severity

0

CVSS Score
0
10

Basic Information

Base CVSS
0
EPSS Probability
0.00652%
EPSS Percentile
0.50304%
Introduced Version
0
Fix Available

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