CVE-2026-31865

{"id": "CVE-2026-31865", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 2.5, "exploitabilityScore": 3.9}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 1.4, "exploitabilityScore": 3.9}]}, "published": "2026-03-18T04:17:19.393", "references": [{"url": "https://github.com/elysiajs/elysia/commit/e9d6b1743fa7368ef942dce181f6a089757f6aab", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/elysiajs/elysia/security/advisories/GHSA-8hq9-phh3-p2wp", "tags": ["Mitigation", "Patch", "Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-1321"}]}], "descriptions": [{"lang": "en", "value": "Elysia is a Typescript framework for request validation, type inference, OpenAPI documentation, and client-server communication. Prior to version 1.4.27, an Elysia cookie can be overridden by prototype pollution , eg. `__proto__`. This issue is patched in 1.4.27. As a workaround, use t.Cookie validation to enforce validation value and/or prevent iterable over cookie if possible."}, {"lang": "es", "value": "Elysia es un framework de Typescript para la validaci\u00f3n de solicitudes, inferencia de tipos, documentaci\u00f3n OpenAPI y comunicaci\u00f3n cliente-servidor. Antes de la versi\u00f3n 1.4.27, una cookie de Elysia pod\u00eda ser sobrescrita mediante contaminaci\u00f3n de prototipos, p. ej. `__proto__`. Este problema est\u00e1 parcheado en la versi\u00f3n 1.4.27. Como soluci\u00f3n alternativa, use la validaci\u00f3n t.Cookie para forzar el valor de validaci\u00f3n y/o evitar la iteraci\u00f3n sobre la cookie si es posible."}], "lastModified": "2026-03-20T17:52:07.900", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:elysiajs:elysia:*:*:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "D271578B-3D8C-496B-A511-4673FFCB69D5", "versionEndExcluding": "1.4.27"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}