Security Advisory

CVE-2026-73299

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-08-12 17:31:38

Last updated 2026-08-12 18:54:20

Assigner GitHub_M

CVSS score not scored

State PUBLISHED

Description

Prompty is a markdown file format (.prompty) for LLM prompts. Prior to 0.1.5 and 2.0.0-beta.5, the TypeScript Nunjucks renderer evaluated untrusted .prompty template bodies with unrestricted JavaScript member access. An attacker-controlled template could traverse constructor and prototype properties to execute JavaScript in the host Node.js process. This issue is fixed in versions 0.1.5 and 2.0.0-beta.5.

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