{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-107399", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-10-07T21:07:54.989Z", "datePublished": "2026-10-08T21:24:46.349Z", "dateUpdated": "2026-10-08T21:24:46.349Z"}, "containers": {"cna": {"title": "Mechanize sends credential headers to another origin after a meta refresh", "problemTypes": [{"descriptions": [{"cweId": "CWE-200", "lang": "en", "description": "CWE-200: Exposure of Sensitive Information to an Unauthorized Actor", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-522", "lang": "en", "description": "CWE-522: Insufficiently Protected Credentials", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/sparklemotion/mechanize/security/advisories/GHSA-c6rp-p8xm-4q9f", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/sparklemotion/mechanize/security/advisories/GHSA-c6rp-p8xm-4q9f"}, {"name": "https://github.com/sparklemotion/mechanize/pull/676", "tags": ["x_refsource_MISC"], "url": "https://github.com/sparklemotion/mechanize/pull/676"}, {"name": "https://github.com/sparklemotion/mechanize/commit/02a1235842d6eda8d4a5a3d8f13aba2cecf52e4f", "tags": ["x_refsource_MISC"], "url": "https://github.com/sparklemotion/mechanize/commit/02a1235842d6eda8d4a5a3d8f13aba2cecf52e4f"}, {"name": "https://github.com/sparklemotion/mechanize/commit/84c74df87d15f5d119df268ba6aa79bc1e16a2c3", "tags": ["x_refsource_MISC"], "url": "https://github.com/sparklemotion/mechanize/commit/84c74df87d15f5d119df268ba6aa79bc1e16a2c3"}, {"name": "https://github.com/sparklemotion/mechanize/releases/tag/v2.14.1", "tags": ["x_refsource_MISC"], "url": "https://github.com/sparklemotion/mechanize/releases/tag/v2.14.1"}], "affected": [{"vendor": "sparklemotion", "product": "mechanize", "versions": [{"version": "< 2.15.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-08T21:24:46.349Z"}, "descriptions": [{"lang": "en", "value": "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."}], "source": {"advisory": "GHSA-c6rp-p8xm-4q9f", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "mechanize", "vendor": "sparklemotion", "versions": [{"status": "affected", "version": "< 2.15.0"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-107399", "lastModified": "2026-10-08T22:17:26.683", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 4.0, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-10-08T22:17:26.683", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/sparklemotion/mechanize/commit/02a1235842d6eda8d4a5a3d8f13aba2cecf52e4f"}, {"source": "security-advisories@github.com", "url": "https://github.com/sparklemotion/mechanize/commit/84c74df87d15f5d119df268ba6aa79bc1e16a2c3"}, {"source": "security-advisories@github.com", "url": "https://github.com/sparklemotion/mechanize/pull/676"}, {"source": "security-advisories@github.com", "url": "https://github.com/sparklemotion/mechanize/releases/tag/v2.14.1"}, {"source": "security-advisories@github.com", "url": "https://github.com/sparklemotion/mechanize/security/advisories/GHSA-c6rp-p8xm-4q9f"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-200"}, {"lang": "en", "value": "CWE-522"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{}