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Vulnerability record · CVE-2026-53598 · published 16 July 2026

CVE-2026-53598: Path traversal vulnerability

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.

7.5 CVSS 3.1 High EPSS 1.3% · top 31.0% CWE-22 · Path traversalCWE-200 · Information exposure Deferred
7.5CVSS 3.1 base score
1.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
17 Jul 2026Last modified by NVD

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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References

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

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Source: NIST National Vulnerability Database (record CVE-2026-53598), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.