CVE-2026-73299

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{"affected": [{"affectedData": [{"product": "prompty", "vendor": "microsoft", "versions": [{"status": "affected", "version": "< 0.1.5"}, {"status": "affected", "version": ">= 2.0.0-alpha.1, < 2.0.0-beta.5"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Prompty is a markdown file format (.prompty) for LLM prompts. Prior to 0.1.5 and 2.0.0-beta.5, the TypeScript Nunjucks renderer evaluated untrusted .prompty template bodies with unrestricted JavaScript member access. An attacker-controlled template could traverse constructor and prototype properties to execute JavaScript in the host Node.js process. This issue is fixed in versions 0.1.5 and 2.0.0-beta.5."}, {"lang": "es", "value": "Prompty es un formato de archivo markdown (.prompty) para prompts de LLM. Antes de las versiones 0.1.5 y 2.0.0-beta.5, el renderizador TypeScript Nunjucks evaluaba cuerpos de plantillas .prompty no confiables con acceso irrestricto a miembros de JavaScript. Una plantilla controlada por el atacante podr\u00eda recorrer propiedades de constructor y prototipo para ejecutar JavaScript en el proceso host de Node.js. Este problema est\u00e1 solucionado en las versiones 0.1.5 y 2.0.0-beta.5."}], "id": "CVE-2026-73299", "lastModified": "2026-10-24T15:10:00.190", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 10.0, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 6.0, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-73299", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-08-12T18:53:50.277151Z", "version": "2.0.3"}}]}, "published": "2026-08-12T18:18:15.197", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/microsoft/prompty/commit/e4a0ebf49e3a78d5d7796c8480bf9a4f0c54d19e"}, {"source": "security-advisories@github.com", "url": "https://github.com/microsoft/prompty/commit/f5c57c94a0990cca79d095c3daab661b4b1fb89f"}, {"source": "security-advisories@github.com", "url": "https://github.com/microsoft/prompty/pull/404"}, {"source": "security-advisories@github.com", "url": "https://github.com/microsoft/prompty/pull/405"}, {"source": "security-advisories@github.com", "url": "https://github.com/microsoft/prompty/security/advisories/GHSA-w28w-gp39-m4p6"}, {"source": "security-advisories@github.com", "url": "https://github.com/microsoft/prompty/tree/typescript/2.0.0-beta.5"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-94"}, {"lang": "en", "value": "CWE-1336"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

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