Vulnerability 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 Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/microsoft/prompty/commit/88ac9948d7d37995edbb2f6d36913436626c
- https://github.com/microsoft/prompty/security/advisories/GHSA-wxhm-2mq7-7697
FAQ
What is CVE-2026-53598?
CVE-2026-53598 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 staye...
How severe is CVE-2026-53598?
CVE-2026-53598 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-53598?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.