CVE-2026-53597 | BDVDB-2026-348980 Detail

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.

Impact#

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Exploit#

History#

1. Version 12026-07-16Record published in the CVE List.
2. Version 22026-07-18Most recent update recorded in the CVE List.