CVE-2026-107715 Details
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.
A vulnerability in the Mechanize library prior to version 2.14.1 allows for the leakage of credentials through headers during cross-origin HTTP redirects. When a redirect occurs to a different host, Mechanize improperly re-applies headers set by the user, including sensitive information such as authorization tokens and session cookies. This issue arises because the library's handling of request headers does not account for the security implications of cross-origin redirects, creating a risk of unauthorized access to user credentials.
Users can update to Mechanize version 2.14.1 or later, where this vulnerability has been fixed. In the patched version, headers set through 'request_headers=' no longer follow cross-origin redirects, and 'Proxy-Authorization' and 'Cookie2' headers are properly stripped on such redirects.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 8, 2026CISA-ADP
Assessed Oct 9, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/sparklemotion/mechanize/security/advisories/GHSA-2mwr-xjcg-37j7 | CISA-ADP | AdvisoryExploitRemedyVendor |
| https://github.com/sparklemotion/mechanize/commit/02a1235842d6eda8d4a5a3d8f13aba2cecf52e4f | [email protected] | Source CodeVendor |
| https://github.com/sparklemotion/mechanize/commit/94e0902867296be804f36eccbb47acf7d5018745 | [email protected] | Source CodeVendor |
| https://github.com/sparklemotion/mechanize/commit/ac49abf2869297d83c3b11bbfb8b18e63b588c95 | [email protected] | Source CodeVendor |
| https://github.com/sparklemotion/mechanize/pull/676 | [email protected] | Issue TrackingVendor |
| https://github.com/sparklemotion/mechanize/releases/tag/v2.14.1 | [email protected] | Release NotesVendor |
| https://github.com/sparklemotion/mechanize/security/advisories/GHSA-2mwr-xjcg-37j7 | [email protected] | AdvisoryExploitRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-200 | Exposure of Sensitive Information to an Unauthorized Actor | [email protected] |
| CWE-522 | Insufficiently Protected Credentials | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Mechanize | < 2.14.1 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 9, 2026 | CVE Modified | CISA-ADP |
| Oct 8, 2026 | New CVE Received | [email protected] |