{"cve":"CVE-2026-107715","nvd":{"published":"2026-10-08T22:17:27.163","modified":"2026-10-09T16:40:29.800","status":"Deferred","description":"The Mechanize library is used for automating interaction with websites. Prior to 2.14.1, Mechanize sends caller-supplied credential headers to a different host after an HTTP redirect. Mechanize#request_headers= is reapplied by Mechanize::HTTP::Agent#request_add_headers even after Mechanize::HTTP::Agent#response_redirect strips per-request headers, and the protected header lists omit Proxy-Authorization and Cookie2. An attacker who controls a redirect target can capture bearer tokens or session cookies supplied through request_headers= or the per-request headers argument, while Mechanize#cookie_jar and Mechanize::HTTP::AuthStore are not affected. This issue is fixed in version 2.14.1.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N","score":6.8},"cwes":["CWE-200","CWE-522"],"references":["https://github.com/sparklemotion/mechanize/commit/02a1235842d6eda8d4a5a3d8f13aba2cecf52e4f","https://github.com/sparklemotion/mechanize/commit/94e0902867296be804f36eccbb47acf7d5018745","https://github.com/sparklemotion/mechanize/commit/ac49abf2869297d83c3b11bbfb8b18e63b588c95","https://github.com/sparklemotion/mechanize/pull/676","https://github.com/sparklemotion/mechanize/releases/tag/v2.14.1"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:58:01.639778232+00:00"},"epss":{"cve":"CVE-2026-107715","score":0.00501,"percentile":0.42616,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-2mwr-xjcg-37j7","url":"https://osv.dev/vulnerability/GHSA-2mwr-xjcg-37j7","summary":"Mechanize sends credential headers to another host after an HTTP redirect","modified":"2026-10-08T22:15:07.251994937Z","packages":[{"ecosystem":"RubyGems","name":"mechanize","purl":"pkg:gem/mechanize","ranges":["<2.14.1"],"fixed":["2.14.1"]}]}],"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."]}