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
Affected Vendors & Products
References
History
Wed, 14 Oct 2026 02:30:00 +0000
| Type | Values Removed | Values Added |
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| Metrics |
ssvc
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Fri, 09 Oct 2026 09:15:00 +0000
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| First Time appeared |
Sparklemotion
Sparklemotion mechanize |
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| Vendors & Products |
Sparklemotion
Sparklemotion mechanize |
Fri, 09 Oct 2026 00:15:00 +0000
| Type | Values Removed | Values Added |
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| Weaknesses | CWE-201 | |
| References |
| |
| Metrics |
threat_severity
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threat_severity
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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 |
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| References |
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| Metrics |
cvssV3_1
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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
Updated: 2026-10-14T01:21:32.542Z
Status : Deferred
Published: 2026-10-08T22:17:26.683
Modified: 2026-10-14T02:16:57.060
Link: CVE-2026-107399