{"cve":"CVE-2014-6393","nvd":{"published":"2017-08-09T18:29:00.480","modified":"2026-06-17T00:13:00.980","status":"Modified","description":"The Express web framework before 3.11 and 4.x before 4.5 for Node.js does not provide a charset field in HTTP Content-Type headers in 400 level responses, which might allow remote attackers to conduct cross-site scripting (XSS) attacks via characters in a non-standard encoding.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1},"cwes":["CWE-79"],"references":["https://bugzilla.redhat.com/show_bug.cgi?id=1203190","https://nodesecurity.io/advisories/express-no-charset-in-content-type-header","https://bugzilla.redhat.com/show_bug.cgi?id=1203190","https://nodesecurity.io/advisories/express-no-charset-in-content-type-header"],"products":["openjsf:express"],"source":"nvd","synced_at":"2026-10-19T20:44:47.710380879+00:00"},"epss":{"cve":"CVE-2014-6393","score":0.01144,"percentile":0.66731,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-gpvr-g6gh-9mc2","url":"https://osv.dev/vulnerability/GHSA-gpvr-g6gh-9mc2","summary":"No Charset in Content-Type Header in express","modified":"2023-11-08T03:57:43.877257Z","packages":[{"ecosystem":"npm","name":"express","purl":"pkg:npm/express","ranges":["<3.11.0"],"fixed":["3.11.0"]},{"ecosystem":"npm","name":"express","purl":"pkg:npm/express","ranges":[">=4.0.0 <4.5.0"],"fixed":["4.5.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}