Vulnerability · Published Oct 15, 2026 · Assigned by VulnCheck

CVE-2026-111160LightLLM through 1.2.0 Unauthenticated DoS via pd_kv_trans_params Deserialization

High 7.5

In plain English

A high-severity unsafe deserialization in LightLLM from ModelTC. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 36% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.4%top 63.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

LightLLM through 1.2.0 contains a denial of service vulnerability that allows unauthenticated attackers to crash the inference worker by supplying the internal pd_kv_trans_params field to the /generate endpoint. Attackers can send a single request whose parameters cause pickle.loads to fail in InferSamplingParams, killing the inference thread while /health stays up and all later requests hang until restart.

Affected products (as reported)

Vendor	Product	Versions
ModelTC	LightLLM	0 – through 1.2.0

Weakness: CWE-502 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

https://github.com/ModelTC/LightLLM/issues/1629 issue-tracking, exploit
https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/api_lightllm.py#L37-L43 technical-description
https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/core/objs/sampling_params.py#L356-L357 technical-description
https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/router/model_infer/infer_batch.py#L484-L485 technical-description
https://github.com/ModelTC/LightLLM product
VulnCheck Advisory: LightLLM through 1.2.0 Unauthenticated DoS via pd_kv_trans_params Deserialization third-party-advisory