{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-73299","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-08-11T19:42:11.450Z","datePublished":"2026-08-12T17:31:38.807Z","dateUpdated":"2026-08-12T18:54:20.646Z"},"containers":{"cna":{"title":"Prompty: Server-Side Template Injection to Remote Code Execution in the @prompty/core Nunjucks Renderer","problemTypes":[{"descriptions":[{"cweId":"CWE-94","lang":"en","description":"CWE-94: Improper Control of Generation of Code ('Code Injection')","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-1336","lang":"en","description":"CWE-1336: Improper Neutralization of Special Elements Used in a Template Engine","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":10,"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"}}],"references":[{"name":"https://github.com/microsoft/prompty/security/advisories/GHSA-w28w-gp39-m4p6","tags":["x_refsource_CONFIRM"],"url":"https://github.com/microsoft/prompty/security/advisories/GHSA-w28w-gp39-m4p6"},{"name":"https://github.com/microsoft/prompty/pull/404","tags":["x_refsource_MISC"],"url":"https://github.com/microsoft/prompty/pull/404"},{"name":"https://github.com/microsoft/prompty/pull/405","tags":["x_refsource_MISC"],"url":"https://github.com/microsoft/prompty/pull/405"},{"name":"https://github.com/microsoft/prompty/commit/e4a0ebf49e3a78d5d7796c8480bf9a4f0c54d19e","tags":["x_refsource_MISC"],"url":"https://github.com/microsoft/prompty/commit/e4a0ebf49e3a78d5d7796c8480bf9a4f0c54d19e"},{"name":"https://github.com/microsoft/prompty/commit/f5c57c94a0990cca79d095c3daab661b4b1fb89f","tags":["x_refsource_MISC"],"url":"https://github.com/microsoft/prompty/commit/f5c57c94a0990cca79d095c3daab661b4b1fb89f"},{"name":"https://github.com/microsoft/prompty/tree/typescript/2.0.0-beta.5","tags":["x_refsource_MISC"],"url":"https://github.com/microsoft/prompty/tree/typescript/2.0.0-beta.5"}],"affected":[{"vendor":"microsoft","product":"prompty","versions":[{"version":"< 0.1.5","status":"affected"},{"version":">= 2.0.0-alpha.1, < 2.0.0-beta.5","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-08-12T17:31:38.807Z"},"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."}],"source":{"advisory":"GHSA-w28w-gp39-m4p6","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-12T18:53:50.277151Z","id":"CVE-2026-73299","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-08-12T18:54:20.646Z"}}]}}