Skip to content
Sign in
8.7 High

CVE-2026-53597 Prompty is a markdown file format (.prompty) for LLM prompts

Description

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 attacker-controlled .prompty file with ---js frontmatter to execute arbitrary JavaScript during prompt loading. This issue is fixed in version 2.0.0-beta.3.

Affected products and versions

Product Affected versions Fixed in
prompty 2.0 2.0.0-alpha.1 → < 2.0.0-beta.3 2.0.0-beta.3

Other CVEs of prompty

The 3 CVEs of prompty →
CVE-2026-73299 Prompty is a markdown file format (.prompty) for LLM prompts 10.0 Critical CVE-2026-53598 Prompty is a markdown file format (.prompty) for LLM prompts 7.5 High
Track this CVE