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...

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...

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

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...

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...

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...

EUVD-2026-44940

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

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...

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...

CVE-2026-53597

Prompty is a markdown file format .prompty for LLM prompts. From 2.0.0-alpha.1 until 2.0.0-beta.3, the @prompty/core TypeScript loader in runtime/typescript/packages/core/src/core/loader.ts used gray-matter without overriding executable js and javascript frontmatter engines, allowing an...

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...

CVE-2026-53598 Prompty: Arbitrary File Read via ${file:path} Reference Expansion

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...

CVE-2026-53598 Prompty: Arbitrary File Read via ${file:path} Reference Expansion

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...

CVE-2026-53598

The CVE-2026-53598 issue affects Prompty (.prompty) loaders that expanded ${file:...} references in frontmatter before 2.0.0-beta.2, allowing an attacker-controlled prompt to read local files via absolute paths, .. traversal, or symlink escapes. Root cause: path confinement was not enforced durin...

CVE-2026-53597

CVE-2026-53597 affects the Prompty markdown format loader: for versions 2.0.0-alpha.1 through 2.0.0-beta.3, the @prompty/core TypeScript loader in runtime/typescript/packages/core/src/core/loader.ts did not override executable engines for js/frontmatter, allowing attacker-controlled .prompty file...