CVE-2026-53598

Description

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 local files through absolute paths, .. traversal, or symlink escapes. This issue is fixed in versions 2.0.0-beta.2.

CVSS Vector

References

• https://github.com/microsoft/prompty/commit/88ac9948d7d37995edbb2f6d36913436626c39e1
• https://github.com/microsoft/prompty/security/advisories/GHSA-wxhm-2mq7-7697