{"cve":"CVE-2026-73299","nvd":{"published":"2026-08-12T18:18:15.197","modified":"2026-10-24T15:10:00.190","status":"Deferred","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","score":10.0},"cwes":["CWE-94","CWE-1336"],"references":["https://github.com/microsoft/prompty/commit/e4a0ebf49e3a78d5d7796c8480bf9a4f0c54d19e","https://github.com/microsoft/prompty/commit/f5c57c94a0990cca79d095c3daab661b4b1fb89f","https://github.com/microsoft/prompty/pull/404","https://github.com/microsoft/prompty/pull/405","https://github.com/microsoft/prompty/security/advisories/GHSA-w28w-gp39-m4p6"],"products":[],"source":"nvd","synced_at":"2026-10-24T16:53:35.584907681+00:00"},"epss":{"cve":"CVE-2026-73299","score":0.01784,"percentile":0.78139,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-w28w-gp39-m4p6","url":"https://osv.dev/vulnerability/GHSA-w28w-gp39-m4p6","summary":"Prompty: Server-Side Template Injection to Remote Code Execution in the @prompty/core Nunjucks Renderer","modified":"2026-08-13T04:11:08.015471511Z","packages":[{"ecosystem":"npm","name":"@prompty/core","purl":"pkg:npm/%40prompty/core","ranges":["<0.1.5"],"fixed":["0.1.5"]},{"ecosystem":"npm","name":"@prompty/core","purl":"pkg:npm/%40prompty/core","ranges":[">=2.0.0-alpha.1 <2.0.0-beta.5"],"fixed":["2.0.0-beta.5"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}