CVE-2026-111160
LightLLM through 1.2.0 Unauthenticated DoS via pd_kv_trans_params Deserialization
- State
- Published
- Severity
- 8.7 High
- Published
- Oct 15, 2026
- Updated
- Oct 21, 2026
- Reserved
- Oct 15, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.7 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | VulnCheck |
Weaknesses
- CWE-502 Deserialization of Untrusted Data
Affected Products
| Product | Versions |
|---|---|
LightLLMModelTC |
|
References
- https://github.com/ModelTC/LightLLM/issues/1629issue-trackingexploit
- https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/api_lightllm.py#L37-L43technical-description
- https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/core/objs/sampling_params.py#L356-L357technical-description
- https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/router/model_infer/infer_batch.py#L484-L485technical-description
- https://github.com/ModelTC/LightLLMproduct
- VulnCheck Advisory: LightLLM through 1.2.0 Unauthenticated DoS via pd_kv_trans_params Deserializationthird-party-advisory
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