---
id: CVE-2026-111160
title: >-
  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
summary: >-
  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 sing…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-502
vendor: ModelTC
product: LightLLM
affected:
  - LightLLM <= 1.2.0
published: '2026-10-15'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T19:17:31.217'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-111160'
references:
  - url: 'https://github.com/ModelTC/LightLLM'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/ModelTC/LightLLM/issues/1629'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/api_lightllm.py#L37-L43
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/core/objs/sampling_params.py#L356-L357
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/router/model_infer/infer_batch.py#L484-L485
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/lightllm-through-1.2.0-unauthenticated-dos-via-pd-kv-trans-params-deserialization
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-15T19:25:46.418Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.