{"id":"CVE-2026-107399","state":"PUBLISHED","title":"Mechanize sends credential headers to another origin after a meta refresh","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.","publishedAt":"2026-10-08T21:24:46.349Z","updatedAt":"2026-10-14T01:21:37.665Z","severity":{"score":6.8,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["sparklemotion mechanize"],"affected":[{"vendor":"sparklemotion","product":"mechanize","versions":[{"version":"< 2.15.0","status":"affected"}]}],"references":["https://github.com/sparklemotion/mechanize/security/advisories/GHSA-c6rp-p8xm-4q9f","https://github.com/sparklemotion/mechanize/pull/676","https://github.com/sparklemotion/mechanize/commit/02a1235842d6eda8d4a5a3d8f13aba2cecf52e4f","https://github.com/sparklemotion/mechanize/commit/84c74df87d15f5d119df268ba6aa79bc1e16a2c3","https://github.com/sparklemotion/mechanize/releases/tag/v2.14.1"],"weaknesses":["CWE-200","CWE-522"],"ingestedAt":"2026-10-29T20:10:23.711Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/107xxx/CVE-2026-107399.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-107399","state":"PUBLISHED","datePublished":"2026-10-08T21:24:46.349Z","dateUpdated":"2026-10-14T01:21:37.665Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-10-07T21:07:54.989Z"},"containers":{"cna":{"title":"Mechanize sends credential headers to another origin after a meta refresh","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."}],"affected":[{"vendor":"sparklemotion","product":"mechanize","versions":[{"version":"< 2.15.0","status":"affected"}]}],"references":[{"url":"https://github.com/sparklemotion/mechanize/security/advisories/GHSA-c6rp-p8xm-4q9f","name":"https://github.com/sparklemotion/mechanize/security/advisories/GHSA-c6rp-p8xm-4q9f","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/sparklemotion/mechanize/pull/676","name":"https://github.com/sparklemotion/mechanize/pull/676","tags":["x_refsource_MISC"]},{"url":"https://github.com/sparklemotion/mechanize/commit/02a1235842d6eda8d4a5a3d8f13aba2cecf52e4f","name":"https://github.com/sparklemotion/mechanize/commit/02a1235842d6eda8d4a5a3d8f13aba2cecf52e4f","tags":["x_refsource_MISC"]},{"url":"https://github.com/sparklemotion/mechanize/commit/84c74df87d15f5d119df268ba6aa79bc1e16a2c3","name":"https://github.com/sparklemotion/mechanize/commit/84c74df87d15f5d119df268ba6aa79bc1e16a2c3","tags":["x_refsource_MISC"]},{"url":"https://github.com/sparklemotion/mechanize/releases/tag/v2.14.1","name":"https://github.com/sparklemotion/mechanize/releases/tag/v2.14.1","tags":["x_refsource_MISC"]}],"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"}}],"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"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-10-08T21:24:46.349Z"},"source":{"advisory":"GHSA-c6rp-p8xm-4q9f","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-14T01:21:27.011574Z","id":"CVE-2026-107399","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-14T01:21:37.665Z"}}]}}}