Prompty: Arbitrary File Read via ${file:path} Reference Expansion
Priority MEDIUM 41CWE-200Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-200.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01286 70th percentileScored 2026-11-07
Fix Fixed prompty (microsoft): 2.0.0-beta.2prompty (PyPI): 2.0.0b2+3 more products
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Microsoft | prompty | before 2.0.0-beta.2 | 2.0.0-beta.2 | Patch available | CNA |
| — | prompty (PyPI) | before 2.0.0b2 | 2.0.0b2 | Patch available | GHSA-wxhm-2mq7-7697 |
| — | @prompty/core (npm) | before 2.0.0-beta.2 | 2.0.0-beta.2 | Patch available | GHSA-wxhm-2mq7-7697 |
| — | prompty (crates.io) | before 2.0.0-beta.2 | 2.0.0-beta.2 | Patch available | GHSA-wxhm-2mq7-7697 |
| — | Prompty.Core (NuGet) | before 2.0.0-beta.2 | 2.0.0-beta.2 | Patch available | GHSA-wxhm-2mq7-7697 |
- prompty VendorMicrosoft Affected before 2.0.0-beta.2 Fixed in 2.0.0-beta.2 Patch available CNA
- prompty (PyPI) Vendor— Affected before 2.0.0b2 Fixed in 2.0.0b2 Patch available GHSA-wxhm-2mq7-7697
- @prompty/core (npm) Vendor— Affected before 2.0.0-beta.2 Fixed in 2.0.0-beta.2 Patch available GHSA-wxhm-2mq7-7697
- prompty (crates.io) Vendor— Affected before 2.0.0-beta.2 Fixed in 2.0.0-beta.2 Patch available GHSA-wxhm-2mq7-7697
- Prompty.Core (NuGet) Vendor— Affected before 2.0.0-beta.2 Fixed in 2.0.0-beta.2 Patch available GHSA-wxhm-2mq7-7697
Remediation
- Fix · CNA prompty (microsoft) Fixed in 2.0.0-beta.2
- Fix · GHSA-wxhm-2mq7-7697 prompty (PyPI) Fixed in 2.0.0b2 Advisory →
- Fix · GHSA-wxhm-2mq7-7697 @prompty/core (npm) Fixed in 2.0.0-beta.2 Advisory →
- Fix · GHSA-wxhm-2mq7-7697 prompty (crates.io) Fixed in 2.0.0-beta.2 Advisory →
- Fix · GHSA-wxhm-2mq7-7697 Prompty.Core (NuGet) Fixed in 2.0.0-beta.2 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-53598
- 2026-10-03 Alias added: GHSA-wxhm-2mq7-7697
References
More Microsoft vulnerabilities
- TI-2026-42212 Microsoft SharePoint Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
- TI-2026-37256 Microsoft SharePoint Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
- TI-2026-26194 Windows Internet Key Exchange (IKE) Service Extensions Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
- TI-2026-16982 Microsoft SharePoint Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
- TI-2025-36863 Windows Server Update Service (WSUS) Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
- TI-2025-33671 Microsoft SharePoint Server Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
Sources
- CVE-2026-53598 · CVE Program
- CVE-2026-53598 · NVD
- FIRST EPSS
- GHSA-wxhm-2mq7-7697 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences