Vulnerability details

CVE-2026-53598

Microsoft prompty

Prompty: Arbitrary File Read via ${file:path} Reference Expansion

CVSS 3.1

7.5High

Official 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 scores

Score	Version	Source	Vector
7.5High	3.1	CVEProject cvelistV5 (CNA) (GitHub_M)	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`

Affected products

Vendor	Product	Versions	Source
Microsoft	prompty	< 2.0.0-beta.2	CVEProject cvelistV5 (CNA)

References and advisories

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

Kolun on Telegram @kolunsec Exploited CVEs, key news and a daily digest Alerts for this product's next CVEsFollow the product to get new vulnerabilities on Telegram.

Details

Published: 2026-07-16
Last updated: 2026-07-17
State: Published
Assigner (CNA): GitHub_M

Exploit prediction (EPSS)

1.28%

Probability of exploitation in 30 days

70.3%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: Yes
Exploitation: None
Technical impact: Partial

Weaknesses (CWE)

CWE-22
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-200
Exposure of Sensitive Information to an Unauthorized Actor