CVE-2026-31017
CriticalCVSS 9.1Exploitation Probability (EPSS)
Low risk15th percentile — higher than 15% of all known CVEs
Summary
A Server-Side Request Forgery (SSRF) vulnerability was found in the Print Format functionality of ERPNext v16.0.1 and Frappe Framework v16.1.1. Insufficient sanitization of user-supplied HTML allows embedding elements like <iframe> that are fetched server-side. An attacker can force the server to make arbitrary HTTP requests to internal services, including cloud metadata endpoints, potentially leading to sensitive information disclosure.
Risk Assessment
The risk involves potential disclosure of sensitive data from internal systems, such as cloud access keys or network configurations, by forcing the server to send requests to unauthorized resources.
Recommendation
Immediately update ERPNext and Frappe Framework to the latest patched versions. As a temporary measure, restrict access to the PDF generation feature and implement server-side HTML filtering.
Original NVD description (English source)
A Server-Side Request Forgery (SSRF) vulnerability exists in the Print Format functionality of ERPNext v16.0.1 and Frappe Framework v16.1.1, where user-supplied HTML is insufficiently sanitized before being rendered into PDF. When generating PDFs from user-controlled HTML content, the application allows the inclusion of HTML elements such as <iframe> that reference external resources. The PDF rendering engine automatically fetches these resources on the server side. An attacker can abuse this behavior to force the server to make arbitrary HTTP requests to internal services, including cloud metadata endpoints, potentially leading to sensitive information disclosure.