CVE-2026-107715
La biblioteca Mechanize se utiliza para automatizar la interacción con sitios web. En versiones anteriores a la 2.14.1, Mechanize envía cabeceras de credenciales proporcionadas por el llamante a un host diferente tras una redirección HTTP. Mechanize#request_headers= vuelve a aplicarse mediante Mechanize::HTTP::Agent#request_add_headers incluso después de que Mechanize::HTTP::Agent#response_redirect elimine las cabeceras por solicitud, y las listas de cabeceras protegidas omiten Proxy-Authorization y Cookie2.
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Un atacante que controle un destino de redirección puede capturar tokens portadores o cookies de sesión proporcionados mediante request_headers= o el argumento de cabeceras por solicitud, mientras que Mechanize#cookie_jar y Mechanize::HTTP::AuthStore no están afectados. Este problema está corregido en la versión 2.14.1.
Traducción automática del texto original de NVD (en inglés).
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
- Puntuación base: 6.8
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.40%
- Percentil entre todas las CVEs puntuadas: 32
- Fecha de la puntuación: 15/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1190Exploit Public-Facing Applicationinitial access75 % - Impacto principal
T1552.007Container APIcredential access85 % - Impacto secundario
T1005Data from Local Systemcollection70 %
Vulnerabilidad de fuga de credenciales en biblioteca HTTP por redirección maliciosa sin validación de destino (AV:N, CWE-200/522). Atacante remoto captura tokens/cookies en encabezados hacia host controlado.
Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.
🛡️ Mitigaciones ATT&CK que cubren estas técnicas
Tecnologías afectadas (1)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
CWE
- CWE-200, CWE-522
Referencias
- https://github.com/sparklemotion/mechanize/commit/02a1235842d6eda8d4a5a3d8f13aba2cecf52e4f
- https://github.com/sparklemotion/mechanize/commit/94e0902867296be804f36eccbb47acf7d5018745
- https://github.com/sparklemotion/mechanize/commit/ac49abf2869297d83c3b11bbfb8b18e63b588c95
- https://github.com/sparklemotion/mechanize/pull/676
- https://github.com/sparklemotion/mechanize/releases/tag/v2.14.1
- https://github.com/sparklemotion/mechanize/security/advisories/GHSA-2mwr-xjcg-37j7
- https://github.com/sparklemotion/mechanize/security/advisories/GHSA-2mwr-xjcg-37j7
JSON original (NVD)
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{
"id": "CVE-2026-107715",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-107715",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "poc"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"version": "2.0.3",
"timestamp": "2026-10-09T13:22:03.491703Z"
}
}
],
"cvssMetricV31": [
{
"type": "Secondary",
"source": "security-advisories@github.com",
"cvssData": {
"scope": "CHANGED",
"version": "3.1",
"baseScore": 6.8,
"attackVector": "NETWORK",
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "HIGH",
"availabilityImpact": "NONE",
"privilegesRequired": "NONE",
"confidentialityImpact": "HIGH"
},
"impactScore": 4,
"exploitabilityScore": 2.2
}
]
},
"affected": [
{
"source": "security-advisories@github.com",
"affectedData": [
{
"vendor": "sparklemotion",
"product": "mechanize",
"versions": [
{
"status": "affected",
"version": "< 2.15.0"
}
]
}
]
}
],
"published": "2026-10-08T22:17:27.163",
"references": [
{
"url": "https://github.com/sparklemotion/mechanize/commit/02a1235842d6eda8d4a5a3d8f13aba2cecf52e4f",
"source": "security-advisories@github.com"
},
{
"url": "https://github.com/sparklemotion/mechanize/commit/94e0902867296be804f36eccbb47acf7d5018745",
"source": "security-advisories@github.com"
},
{
"url": "https://github.com/sparklemotion/mechanize/commit/ac49abf2869297d83c3b11bbfb8b18e63b588c95",
"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-2mwr-xjcg-37j7",
"source": "security-advisories@github.com"
},
{
"url": "https://github.com/sparklemotion/mechanize/security/advisories/GHSA-2mwr-xjcg-37j7",
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
}
],
"vulnStatus": "Deferred",
"weaknesses": [
{
"type": "Secondary",
"source": "security-advisories@github.com",
"description": [
{
"lang": "en",
"value": "CWE-200"
},
{
"lang": "en",
"value": "CWE-522"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "The Mechanize library is used for automating interaction with websites. Prior to 2.14.1, Mechanize sends caller-supplied credential headers to a different host after an HTTP redirect. Mechanize#request_headers= is reapplied by Mechanize::HTTP::Agent#request_add_headers even after Mechanize::HTTP::Agent#response_redirect strips per-request headers, and the protected header lists omit Proxy-Authorization and Cookie2. An attacker who controls a redirect target can capture bearer tokens or session cookies supplied through request_headers= or the per-request headers argument, while Mechanize#cookie_jar and Mechanize::HTTP::AuthStore are not affected. This issue is fixed in version 2.14.1."
}
],
"lastModified": "2026-10-09T16:40:29.800",
"sourceIdentifier": "security-advisories@github.com"
}