{"id":"CVE-2026-73299","revision":"520d5bccdc1c40a48dd307b56f284578","records":[{"revision":"520d5bccdc1c40a48dd307b56f284578","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-73299","aliases":[],"title":"Prompty: Server-Side Template Injection to Remote Code Execution in the @prompty/core Nunjucks Renderer","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.","state":0,"publishedAt":"2026-08-12T17:31:38.807+00:00","modifiedAt":"2026-08-12T18:54:20.646+00:00","affected":[{"ecosystem":"Vendor product","name":"prompty","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"microsoft\",\n                    \"product\": \"prompty\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 0.1.5\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 2.0.0-alpha.1, < 2.0.0-beta.5\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","score":10,"severity":"CRITICAL"}],"references":["https://github.com/microsoft/prompty/security/advisories/GHSA-w28w-gp39-m4p6","https://github.com/microsoft/prompty/pull/404","https://github.com/microsoft/prompty/pull/405","https://github.com/microsoft/prompty/commit/e4a0ebf49e3a78d5d7796c8480bf9a4f0c54d19e","https://github.com/microsoft/prompty/commit/f5c57c94a0990cca79d095c3daab661b4b1fb89f","https://github.com/microsoft/prompty/tree/typescript/2.0.0-beta.5"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-73299","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-73299","identifiers":["CVE-2026-73299"]},"retained":false,"historicalAffected":[]}],"coverage":[]}