CVE-2026-42155

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By narrowing the LCG window (via server state leaks or general predictability) and leveraging the lack of API rate-limiting, an attacker can generate a localized pool of candidate MD5 hashes and execute a high-speed online brute-force attack to hijack active API sessions. This vulnerability is fixed in 20.18.0."}, {"lang": "es", "value": "Magento Long Term Support (LTS) es un proyecto no oficial, impulsado por la comunidad, que proporciona una alternativa a la plataforma de comercio electr\u00f3nico Magento Community Edition con un alto nivel de compatibilidad con versiones anteriores. Antes de la versi\u00f3n 20.18.0, el ID de sesi\u00f3n de la API XML-RPC / SOAP se genera utilizando una construcci\u00f3n obsoleta basada en el tiempo en lugar de un Generador de N\u00fameros Pseudoaleatorios Criptogr\u00e1ficamente Seguro (CSPRNG). Todas las entradas al hash MD5 se derivan del tiempo y no son seguras. Debido a que el resumen resultante depende completamente de la marca de tiempo y del estado interno LCG de PHP, la entrop\u00eda efectiva est\u00e1 severamente restringida. Esto viola el requisito de OWASP ASVS v4 de ? 64 bits de entrop\u00eda (V3.2.2) y los est\u00e1ndares NIST SP 800-63B. Al reducir la ventana LCG (mediante fugas de estado del servidor o previsibilidad general) y aprovechando la falta de limitaci\u00f3n de velocidad de la API, un atacante puede generar un conjunto localizado de hashes MD5 candidatos y ejecutar un ataque de fuerza bruta en l\u00ednea de alta velocidad para secuestrar sesiones de API activas. Esta vulnerabilidad se corrigi\u00f3 en la versi\u00f3n 20.18.0."}], "id": "CVE-2026-42155", "lastModified": "2026-10-26T14:10:00.130", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 9.3, "baseSeverity": "CRITICAL", "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": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/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": "LOW", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-42155", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-05-15T17:36:24.561394Z", "version": "2.0.3"}}]}, "published": "2026-05-15T17:16:46.613", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/OpenMage/magento-lts/security/advisories/GHSA-2cwr-gcf9-pvxr"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/OpenMage/magento-lts/security/advisories/GHSA-2cwr-gcf9-pvxr"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-330"}, {"lang": "en", "value": "CWE-331"}, {"lang": "en", "value": "CWE-338"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

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