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.

Related CPE's


Could not find any relations

Weaknesses



CWE-200CWE-522

CVSS impact metrics


CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N

6.8 · Medium

Information


Source identifier

[email protected]

Vulnerability status

Deferred

Published

2026-10-08T22:17:27.163Z

20 hours ago

Last modified

2026-10-09T16:40:29.800Z

1 hour ago