{"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":"2026-10-02","sourceUpdated":"2026-10-02T17:17:02.293","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"},{"url":"https://github.com/ModelTC/LightLLM/issues/1608","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"yes","technicalImpact":"partial","timestamp":"2026-10-02T16:17:11.695138Z"},"epss":0.0031,"epssPercentile":0.23698,"ingestedAt":"2026-09-30T15:07:05.378Z","slug":"CVE-2026-103243","body":"## Overview\n\nLightLLM 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":44,"depthScoreParts":{"impact":31.9,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":215000,"id":"CVE-2026-103243","ts":1790961878568,"field":"exploit_available","old":"false","new":"true"}]}