{"cve":"CVE-2025-71405","nvd":{"published":"2026-08-14T12:16:43.297","modified":"2026-10-08T16:16:53.587","status":"Deferred","description":"chi versions before v5.2.2 contain an open redirect vulnerability in the RedirectSlashes middleware function that uses the Host header to construct redirect URLs. Attackers can manipulate the Host header to redirect users to arbitrary hosts, enabling phishing attacks and credential theft.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","score":5.1},"cvss_v3":null,"cwes":["CWE-601"],"references":["https://github.com/go-chi/chi/security/advisories/GHSA-vrw8-fxc6-2r93","https://www.vulncheck.com/advisories/go-chi-chi-before-open-redirect-via-redirectslashes","https://github.com/go-chi/chi/security/advisories/GHSA-vrw8-fxc6-2r93"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:48:17.459049833+00:00"},"epss":{"cve":"CVE-2025-71405","score":0.00388,"percentile":0.32656,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-vrw8-fxc6-2r93","url":"https://osv.dev/vulnerability/GHSA-vrw8-fxc6-2r93","summary":"chi Allows Host Header Injection which Leads to Open Redirect in RedirectSlashes","modified":"2026-10-02T23:30:06.689984674Z","packages":[{"ecosystem":"Go","name":"github.com/go-chi/chi/v5","purl":"pkg:golang/github.com/go-chi/chi/v5","ranges":["<5.2.2"],"fixed":["5.2.2"]}]},{"id":"GO-2025-3770","url":"https://osv.dev/vulnerability/GO-2025-3770","summary":"Host header injection which leads to open redirect in RedirectSlashes in github.com/go-chi/chi","modified":"2026-08-15T05:19:10.246790670Z","packages":[{"ecosystem":"Go","name":"github.com/go-chi/chi/v5","purl":"pkg:golang/github.com/go-chi/chi/v5","ranges":[">=5.2.1 <5.2.2"],"fixed":["5.2.2"]}]}],"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."]}