CVE-2026-15806

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Credentials registered with a bare authority (such as example.com or example.com:8080) continue to match any scheme, preserving compatibility with existing code, including proxy authentication.\n\nUsers who cannot upgrade immediately can mitigate by ensuring that applications never make plain http:// requests to hosts for which credentials are registered, for example by not following redirects to http:// URLs."}, {"lang": "es", "value": "La clase HTTPPasswordMgr en el m\u00f3dulo urllib.request, junto con sus subclases HTTPPasswordMgrWithDefaultRealm y HTTPPasswordMgrWithPriorAuth, no ten\u00edan en cuenta el esquema de la URL al hacer coincidir las credenciales almacenadas con una URL solicitada. Las credenciales a\u00f1adidas para una URL https:// tambi\u00e9n se utilizaban para solicitudes al mismo host a trav\u00e9s de http://, por lo que un atacante capaz de redirigir o degradar a un cliente a HTTP simple (por ejemplo, mediante una redirecci\u00f3n de HTTPS a HTTP o una posici\u00f3n en la ruta) podr\u00eda capturar credenciales en texto claro. Las credenciales a\u00f1adidas para URLs http:// de igual manera podr\u00edan enviarse a trav\u00e9s de https://.\n\nLa coincidencia de credenciales ahora est\u00e1 limitada por el esquema de la URL. Las credenciales registradas con una URL que incluye un esquema solo se utilizan para solicitudes con el mismo esquema. Las credenciales registradas con una autoridad simple (como example.com o example.com:8080) contin\u00faan coincidiendo con cualquier esquema, preservando la compatibilidad con el c\u00f3digo existente, incluida la autenticaci\u00f3n de proxy.\n\nLos usuarios que no pueden actualizar de inmediato pueden mitigar asegur\u00e1ndose de que las aplicaciones nunca realicen solicitudes http:// simples a hosts para los que las credenciales est\u00e1n registradas, por ejemplo, al no seguir redirecciones a URLs http://."}], "id": "CVE-2026-15806", "lastModified": "2026-11-10T13:18:28.260", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 6.0, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "PASSIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "cna@python.org", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-15806", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-08-18T18:56:36.349726Z", "version": "2.0.3"}}]}, "published": "2026-08-18T16:17:02.220", "references": [{"source": "cna@python.org", "url": "https://github.com/python/cpython/commit/641be42bb07921ba0f8bffe228b1dc706b092ef6"}, {"source": "cna@python.org", "url": "https://github.com/python/cpython/commit/851cf9a7142ecbdd39f831055533f58284ad2bcc"}, {"source": "cna@python.org", "url": "https://github.com/python/cpython/commit/95355ee3a8e1d3c3d4858d1973aa42a9b91a2801"}, {"source": "cna@python.org", "url": "https://github.com/python/cpython/commit/a0d023fbd23773e24b35d8368789470e22cda5d8"}, {"source": "cna@python.org", "url": "https://github.com/python/cpython/commit/a2773a34183b7d94a243bb98fd658926cc5348ce"}, {"source": "cna@python.org", "url": "https://github.com/python/cpython/commit/a7bb524fef61f77ede01f660ffbd591e1d5837ce"}, {"source": "cna@python.org", "url": "https://github.com/python/cpython/commit/dac88d8615078c55f1304ea4c7a2d822700d4e5a"}, {"source": "cna@python.org", "url": "https://github.com/python/cpython/issues/155694"}, {"source": "cna@python.org", "url": "https://github.com/python/cpython/pull/155696"}, {"source": "cna@python.org", "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/3OKPE5S75KDNA7FY7AI3PL2MXM2X5RB3/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2026/08/18/3"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-457936.html"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/python/cpython/issues/155694"}], "sourceIdentifier": "cna@python.org", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-319"}, {"lang": "en", "value": "CWE-522"}], "source": "cna@python.org", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,3.16.0)"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "CPython", "source": "cna", "vendor": "Python Software Foundation"}, "product": "cpython", "vendor": "python"}], "created": "2026-08-18T17:30:15.393989+00:00", "updated": "2026-08-18T17:30:15.508138+00:00", "vendors": ["python", "python$PRODUCT$cpython"]}