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CVE-2026-107399 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

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.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CNA: [email protected]CVSS-B:6.8 MEDIUMVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/sparklemotion/mechanize/commit/02a1235842d6eda8d4a5a3d8f13aba2cecf52e4f	[email protected]	Source CodeVendor
https://github.com/sparklemotion/mechanize/commit/84c74df87d15f5d119df268ba6aa79bc1e16a2c3	[email protected]	Source CodeVendor
https://github.com/sparklemotion/mechanize/pull/676	[email protected]	Source CodeVendor
https://github.com/sparklemotion/mechanize/releases/tag/v2.14.1	[email protected]	Release NotesVendor
https://github.com/sparklemotion/mechanize/security/advisories/GHSA-c6rp-p8xm-4q9f	[email protected]	AdvisoryRemedyVendor

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 cpe:2.3:a:mechanize_project:mechanize:::::::: Remediation Upgrade: 2.14.1moderate effort Workaround:low effort Leave `Mechanize#follow_meta_refresh` at its default of `false`, or avoid using `request_headers=` for credentials when it is enabled.

Change History

2 change records found show changes

Date	Action	Recorded By
Oct 14, 2026	CVE Modified	CISA-ADP
Oct 8, 2026	New CVE Received	[email protected]