{"cve":"CVE-2026-107399","nvd":{"published":"2026-10-08T22:17:26.683","modified":"2026-10-14T02:16:57.060","status":"Deferred","description":"The Mechanize library is used for automating interaction with websites. Prior to 2.14.1, Mechanize applies no origin trust boundary in Mechanize::HTTP::Agent#response_follow_meta_refresh when Mechanize#follow_meta_refresh is enabled. A page containing a meta refresh to another origin causes headers configured through Mechanize#request_headers= to be reapplied to the refresh request, allowing an attacker who controls content in the crawl to capture bearer tokens or session cookies. The default configuration is not affected because follow_meta_refresh is false, and the exposure is limited to caller-supplied default headers. 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/84c74df87d15f5d119df268ba6aa79bc1e16a2c3","https://github.com/sparklemotion/mechanize/pull/676","https://github.com/sparklemotion/mechanize/releases/tag/v2.14.1","https://github.com/sparklemotion/mechanize/security/advisories/GHSA-c6rp-p8xm-4q9f"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:58:01.639778232+00:00"},"epss":{"cve":"CVE-2026-107399","score":0.00362,"percentile":0.29808,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-c6rp-p8xm-4q9f","url":"https://osv.dev/vulnerability/GHSA-c6rp-p8xm-4q9f","summary":"Mechanize sends credential headers to another origin after a meta refresh","modified":"2026-10-08T22:30:20.277030613Z","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."]}