CVE-2026-107715

Name	CVE-2026-107715
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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
ruby-mechanize (PTS)	bookworm	2.8.5-1	vulnerable
	trixie	2.10.1-1	vulnerable
	forky, sid	2.14.1-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
ruby-mechanize	source	(unstable)	2.14.1-1

Notes

https://github.com/sparklemotion/mechanize/security/advisories/GHSA-2mwr-xjcg-37j7
https://github.com/sparklemotion/mechanize/pull/676
Fixed by: https://github.com/sparklemotion/mechanize/commit/02a1235842d6eda8d4a5a3d8f13aba2cecf52e4f (v2.14.1)
Fixed by: https://github.com/sparklemotion/mechanize/commit/94e0902867296be804f36eccbb47acf7d5018745 (v2.14.1)
Fixed by: https://github.com/sparklemotion/mechanize/commit/ac49abf2869297d83c3b11bbfb8b18e63b588c95 (v2.14.1)