Is this vulnerability remotely exploitable over the internet?

Yes, if remote users can influence Print Format HTML or trigger PDF generation endpoints, they can potentially coerce the server into making SSRF requests, even though the ultimate targets (internal services) are not themselves internet-accessible.

Does an attacker need authenticated access to exploit this issue?

Often some level of access is required, such as permissions to create or modify Print Formats or records that feed into them. The exact requirement depends on how ERPNext/Frappe permissions and workflows are configured, but exploitation generally hinges on influencing the HTML used for PDF generation.

What is the safest general fix pattern for this class of bug?

The most robust approach is to prevent user-controlled data from driving server-side HTTP requests: disable external resource loading in PDF rendering, apply strict HTML sanitization to remove networked elements, and enforce outbound URL allowlists for any remaining required requests.

Severity:

CRITICAL RISK

(9.1)

Server-Side Request Forgery (CWE-918) in ERPNext/Frappe PDF Print Format Rendering

CVE-2026-31017

Published:

Apr 8, 2026

Status:

Undergoing Analysis

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-77;CWE-78

CRITICAL RISK

CRITICAL

(9.8)

OS Command Injection (CWE-78) in Totolink A7100RU CGI Handler setAccessDeviceCfg

Remote Code Execution on the Router

April 12, 2026

CWE-77;CWE-78

CRITICAL RISK

CRITICAL

(9.8)

OS Command Injection (CWE-78) in Totolink A7100RU CGI setLedCfg Handler

Remote Code Execution on the Router

April 12, 2026

Vulnerability Type

Category:

Server-Side Request Forgery (SSRF)

CWE:

CWE-918

Impact:

Sensitive Information Disclosure and Internal Network Exposure

Severity:

CRITICAL RISK

(9.1)

CVSS Version:

3.1

Vulnerability Type

Category:

Server-Side Request Forgery (SSRF)

CWE:

CWE-918

Impact:

Sensitive Information Disclosure and Internal Network Exposure

Severity:

CRITICAL RISK

(9.1)

CVSS Version:

3.1

Catch This CVE While Code Is Being Written

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Ask AI for summary of CodeAnt

Server-Side Request Forgery (CWE-918) in ERPNext/Frappe PDF Print Format Rendering

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

CRITICAL RISK

CRITICAL

(9.8)

OS Command Injection (CWE-78) in Totolink A7100RU CGI Handler setAccessDeviceCfg

CRITICAL RISK

CRITICAL

(9.8)

OS Command Injection (CWE-78) in Totolink A7100RU CGI setLedCfg Handler

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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