CRITICALVulnerability
CVE-2026-73299
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.
Properties
- severity
- CRITICAL
- score
- 10
- epss_score
- 0.01215
- cve_id
- CVE-2026-73299
- vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- published_at
- 2026-08-12T18:18:15.197
- last_modified
- 2026-09-09T21:02:22.660
- epss_percentile
- 0.66746
Related Entities (4)
ENRICHED_BY (1)
→[Source]FIRST EPSS
HAS_WEAKNESS (2)
→[Weakness]Improper Control of Generation of Code ('Code Injection')
→[Weakness]Improper Neutralization of Special Elements Used in a Template Engine
DESCRIBED_BY (1)
→[Source]NVD
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