Vendor
Server-Side Template Injection to Remote Code Execution in @prompty/core Nunjucks Renderer
1 TTPA critical server-side template injection vulnerability exists in the @prompty/core Nunjucks renderer, affecting versions <= 0.1.4 and >= 2.0.0-alpha.1 up to <= 2.0.0-beta.4. This flaw allows an attacker to execute arbitrary JavaScript code within the host Node.js process by crafting malicious `.prompty` template bodies. The renderer's unrestricted JavaScript member access permits traversal of constructor and prototype properties, leading to remote code execution when rendering untrusted, community-supplied, cloned, or LLM-generated `.prompty` files.
Arbitrary Code Execution via JavaScript Frontmatter in Prompty TypeScript Loader
1 TTP 1 CVEA high-severity vulnerability, CVE-2026-53597, in the Prompty TypeScript loader (`@prompty/core`) versions `>= 2.0.0-alpha.1 < 2.0.0-beta.3` allows arbitrary JavaScript code execution in the host Node.js process when parsing untrusted `.prompty` files due to improper handling of `gray-matter`'s executable frontmatter engines.
Prompty Arbitrary File Read Vulnerability via File Reference Expansion (CVE-2026-53598)
2 TTPs 1 CVEA path traversal vulnerability, CVE-2026-53598, in Prompty loaders allows an attacker-controlled `.prompty` file to read arbitrary files accessible to the host application process due to improper validation of `${file:...}` references in frontmatter, leading to sensitive local file disclosure.