CVE-2026-73299
⛔ criticalSummary
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.
CVSS Score
10.0
Critical
EPSS Score
-
Published Date
2026-08-12
First Seen: 2026-08-13
📊 Relative Risk Intelligence
This CVE is Extremely High Risk - more severe than 100.0% of all 344,170 vulnerabilities in our database.
#1
Top 5% most severe
Severity Percentile
🎯 CISA SSVC Assessment Updated: Aug 12, 2026
🔍 Exploitation Status
None
No known exploits
⚙️ Automatable
YES
Can be exploited automatically
💥 Technical Impact
Total
Complete system compromise possible
SSVC data provided by
CISA
Last Modified
2026-08-12
Source
NVD 🔗
CVSS Vector 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H