---
id: CVE-2026-103243
title: >-
  LightLLM through 1.2.0 fails to validate image_url and audio_url parameters in
  multimodal endpoints, allowing unauthenticated attackers to perform
  server-side request forgery
summary: >-
  LightLLM through 1.2.0 fails to validate image_url and audio_url parameters in
  multimodal endpoints, allowing unauthenticated attackers to perform
  server-side request forgery. Attackers can supply arbitrary URLs to fetch
  internal resourc…
severity: medium
cvss: 5.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N'
cwe:
  - CWE-918
vendor: ModelTC
product: LightLLM
affected:
  - LightLLM <= 1.2.0
published: '2026-09-30'
updated: '2026-09-30'
sourceUpdated: '2026-09-30T15:22:26.790'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-103243'
references:
  - url: 'https://github.com/ModelTC/LightLLM'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/ModelTC/LightLLM/issues/1608'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/multimodal_params.py#L149
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/utils/multimodal_utils.py#L82-L91
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/lightllm-through-1.2.0-server-side-request-forgery-via-multimodal-endpoints
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-30T15:07:05.378Z'
---

## Overview

LightLLM through 1.2.0 fails to validate image_url and audio_url parameters in multimodal endpoints, allowing unauthenticated attackers to perform server-side request forgery. Attackers can supply arbitrary URLs to fetch internal resources, with vision model processing disclosing content or error responses revealing internal network topology.

## Remediation

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