{"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":"2026-07-18T02:51:03.900Z"},"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"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-18T02:50:54.007782Z","id":"CVE-2026-53597","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-07-18T02:51:03.900Z"}}]}}