Arbitrary Code Injection

Overview @prompty/core is a Prompty core package Affected versions of this package are vulnerable to Arbitrary Code Injection via the NunjucksRenderer in nunjucks.ts, which passes user-controlled inputs directly to env.renderString without restricting member access or function calls within the...

CVE-2026-73299

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 propertie...

EUVD-2026-57382

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 propertie...

CVE-2026-73299 Prompty: Server-Side Template Injection to Remote Code Execution in the @prompty/core Nunjucks Renderer

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 propertie...

CVE-2026-73299

Summary: CVE-2026-73299 affects Prompty’s TypeScript Nunjucks renderer used for .prompty templates. Prior to versions 0.1.5 and 2.0.0-beta.5, untrusted .prompty template bodies were evaluated with unrestricted JavaScript member access, allowing an attacker-controlled template to traverse construc...

CVE-2026-73299 Prompty: Server-Side Template Injection to Remote Code Execution in the @prompty/core Nunjucks Renderer

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 propertie...

CVE-2026-73299 Prompty: Server-Side Template Injection to Remote Code Execution in the @prompty/core Nunjucks Renderer

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 propertie...

GHSA-W28W-GP39-M4P6 Prompty: Server-Side Template Injection to Remote Code Execution in the @prompty/core Nunjucks Renderer

Summary 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. Affected packages - npm...

PT-2026-71197

Name of the Vulnerable Software and Affected Versions Prompty versions prior to 0.1.5 Prompty versions prior to 2.0.0-beta.5 Description The TypeScript Nunjucks renderer evaluates untrusted .prompty template bodies with unrestricted JavaScript member access. This allows an attacker to control a...

Code Injection

@prompty/core is vulnerable to Code Injection. The vulnerability is due to the use of gray-matter with executable JavaScript frontmatter enabled, which allows an attacker to execute arbitrary JavaScript by supplying a malicious .prompty file...

GHSA-C4GH-RV8H-Q9VW Prompty: Arbitrary code execution via JavaScript frontmatter in TypeScript loader

Summary The TypeScript Prompty loader used gray-matter without overriding executable frontmatter engines. gray-matter supports JavaScript frontmatter blocks such as ---js and evaluates them while parsing. An attacker-controlled .prompty file could therefore execute arbitrary JavaScript during...

Prompty: Arbitrary code execution via JavaScript frontmatter in TypeScript loader

Summary The TypeScript Prompty loader used gray-matter without overriding executable frontmatter engines. gray-matter supports JavaScript frontmatter blocks such as ---js and evaluates them while parsing. An attacker-controlled .prompty file could therefore execute arbitrary JavaScript during...

EUVD-2026-44939

Prompty: Arbitrary code execution via JavaScript frontmatter in TypeScript loader...

Prompty: Arbitrary file read via file reference expansion

Summary Prompty loaders expanded $file:... references in .prompty frontmatter without enforcing that the resolved path stayed within an authorized directory. An attacker-controlled prompt file could use path traversal or an absolute path to cause the host application to read files accessible to t...

EUVD-2026-44940

Prompty: Arbitrary file read via file reference expansion...

Directory Traversal

Overview prompty is a Prompty is a new asset class and format for LLM prompts that aims to provide observability, understandability, and portability for developers. It includes spec, tooling, and a runtime. This Prompty runtime supports Python Affected versions of this package are vulnerable to...

Directory Traversal

Overview @prompty/core is a Prompty core package Affected versions of this package are vulnerable to Directory Traversal via the file reference expansion process. An attacker can access arbitrary files available to the application process by supplying a specially crafted .prompty file containing...

Directory Traversal

Overview Affected versions of this package are vulnerable to Directory Traversal via the file reference expansion process. An attacker can access arbitrary files available to the application process by supplying a specially crafted .prompty file containing $file:... references that use path...

GHSA-WXHM-2MQ7-7697 Prompty: Arbitrary file read via file reference expansion

Summary Prompty loaders expanded $file:... references in .prompty frontmatter without enforcing that the resolved path stayed within an authorized directory. An attacker-controlled prompt file could use path traversal or an absolute path to cause the host application to read files accessible to t...

CVE-2026-53598

Prompty is a markdown file format .prompty for LLM prompts. Prior to 2.0.0-beta.2, Prompty loaders expanded $file:... references in .prompty frontmatter without enforcing that resolved paths stayed within the prompt directory or allowed roots, allowing an attacker-controlled prompt file to read...