{"id":"CVE-2025-66452","title":"LibreChat is a ChatGPT clone with additional features","summary":"LibreChat is a ChatGPT clone with additional features. In versions 0.8.0 and below, there is no handler for JSON parsing errors; SyntaxError from express.json() includes user input in the error message, which gets reflected in responses.…","severity":"medium","cvss":6.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","cwe":["CWE-79"],"vendor":"librechat","product":"librechat","affected":["librechat <= 0.8.0"],"published":"2025-12-11","updated":"2026-10-07","sourceUpdated":"2026-10-07T20:10:01.970","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-66452","references":[{"url":"https://github.com/danny-avila/LibreChat/security/advisories/GHSA-q6c5-gvj5-c264","label":"security-advisories@github.com"}],"tags":["nvd"],"epss":0.00216,"epssPercentile":0.10972,"ingestedAt":"2026-10-07T20:46:46.869Z","slug":"CVE-2025-66452","body":"## Overview\n\nLibreChat is a ChatGPT clone with additional features. In versions 0.8.0 and below, there is no handler for JSON parsing errors; SyntaxError from express.json() includes user input in the error message, which gets reflected in responses. User input (including HTML/JavaScript) can be exposed in error responses, creating an XSS risk if Content-Type isn't strictly enforced. This issue does not have a fix at the time of publication.\n\n## Affected\n\n- `librechat <= 0.8.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":34,"depthScoreParts":{"impact":33.6,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}