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.
History

Wed, 14 Oct 2026 02:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 09 Oct 2026 09:15:00 +0000

Type Values Removed Values Added
First Time appeared Sparklemotion
Sparklemotion mechanize
Vendors & Products Sparklemotion
Sparklemotion mechanize

Fri, 09 Oct 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-201
References
Metrics threat_severity

None

threat_severity

Moderate


Thu, 08 Oct 2026 21:30:00 +0000

Type Values Removed Values Added
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.
Title Mechanize sends credential headers to another origin after a meta refresh
Weaknesses CWE-200
CWE-522
References
Metrics cvssV3_1

{'score': 6.8, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-10-08T21:24:46.349Z

Updated: 2026-10-14T01:21:37.665Z

Reserved: 2026-10-07T21:07:54.989Z

Link: CVE-2026-107399

cve-icon Vulnrichment

Updated: 2026-10-14T01:21:32.542Z

cve-icon NVD

Status : Deferred

Published: 2026-10-08T22:17:26.683

Modified: 2026-10-14T02:16:57.060

Link: CVE-2026-107399

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-10-08T21:24:46Z

Links: CVE-2026-107399 - Bugzilla