CVE-2026-73299

{"id": "CVE-2026-73299", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-73299", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-08-12T18:53:50.277151Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 10.0, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 6.0, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "microsoft", "product": "prompty", "versions": [{"status": "affected", "version": "< 0.1.5"}, {"status": "affected", "version": ">= 2.0.0-alpha.1, < 2.0.0-beta.5"}]}]}], "published": "2026-08-12T18:18:15.197", "references": [{"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", "source": "security-advisories@github.com"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-94"}, {"lang": "en", "value": "CWE-1336"}]}], "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."}], "lastModified": "2026-09-09T21:02:22.660", "sourceIdentifier": "security-advisories@github.com"}