{"id":"CVE-2025-8848","summary":"HTML Injection in Accept-Language Header in danny-avila/librechat","details":"A vulnerability in danny-avila/librechat version 0.7.9 allows for HTML injection via the Accept-Language header. When a logged-in user sends an HTTP GET request with a crafted Accept-Language header, arbitrary HTML can be injected into the \u003chtml lang=\"\"\u003e tag of the response. This can lead to potential security risks such as cross-site scripting (XSS) attacks.","modified":"2026-08-12T03:51:22.520520912Z","published":"2025-10-22T13:54:00.389Z","database_specific":{"cna_assigner":"@huntr_ai","cwe_ids":["CWE-94"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/8xxx/CVE-2025-8848.json"},"references":[{"type":"WEB","url":"https://huntr.com/bounties/a05ebc1f-882a-4adc-b178-d3cefa4b730e"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/8xxx/CVE-2025-8848.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-8848"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/danny-avila/librechat","events":[{"introduced":"bef5c26bed4e5053bdf1936d6ded2c77035c6ee5"},{"last_affected":"bef5c26bed4e5053bdf1936d6ded2c77035c6ee5"}],"database_specific":{"extracted_events":[{"introduced":"0.7.9-NA"},{"last_affected":"0.7.9-NA"}],"source":"CPE_STRING","cpe":"cpe:2.3:a:librechat:librechat:0.7.9:-:*:*:*:*:*:*"}}],"versions":["0.7.9-NA","v0.7.9","librechat-1.8.9"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-8848.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N"}]}