{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-53597", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-06-09T19:39:52.404Z", "datePublished": "2026-07-16T14:54:55.075Z", "dateUpdated": "2026-07-16T14:54:55.075Z"}, "containers": {"cna": {"title": "Prompty: Arbitrary code execution via JavaScript frontmatter in TypeScript loader", "problemTypes": [{"descriptions": [{"cweId": "CWE-94", "lang": "en", "description": "CWE-94: Improper Control of Generation of Code ('Code Injection')", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 8.7, "baseSeverity": "HIGH", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N", "version": "4.0"}}], "references": [{"name": "https://github.com/microsoft/prompty/security/advisories/GHSA-c4gh-rv8h-q9vw", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/microsoft/prompty/security/advisories/GHSA-c4gh-rv8h-q9vw"}, {"name": "https://github.com/microsoft/prompty/commit/c27402da2487075be577f06aa79df627fb9d6853", "tags": ["x_refsource_MISC"], "url": "https://github.com/microsoft/prompty/commit/c27402da2487075be577f06aa79df627fb9d6853"}], "affected": [{"vendor": "microsoft", "product": "prompty", "versions": [{"version": ">= 2.0.0-alpha.1, < 2.0.0-beta.3", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-07-16T14:54:55.075Z"}, "descriptions": [{"lang": "en", "value": "Prompty is a markdown file format (.prompty) for LLM prompts. From 2.0.0-alpha.1 until 2.0.0-beta.3, the @prompty/core TypeScript loader in runtime/typescript/packages/core/src/core/loader.ts used gray-matter without overriding executable js and javascript frontmatter engines, allowing an attacker-controlled .prompty file with ---js frontmatter to execute arbitrary JavaScript during prompt loading. This issue is fixed in version 2.0.0-beta.3."}], "source": {"advisory": "GHSA-c4gh-rv8h-q9vw", "discovery": "UNKNOWN"}}}}

{}

{}

{}

{}