What is CVE-2026-31017?

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 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.

How severe is CVE-2026-31017?

CVE-2026-31017 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2026-31017 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-31017?

CVE-2026-31017 primarily affects Frappe Erpnext. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-31017?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-31017 have an EU (EUVD) identifier?

Yes. CVE-2026-31017 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20511.

When was CVE-2026-31017 published?

CVE-2026-31017 was published on 2026-04-08 and last updated on 2026-07-25.

CVE-2026-31017

CVE-2026-31017 is a critical-severity vulnerability in Frappe Erpnext with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-918.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
EPSS exploit prediction: 0% (15th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-20511
Weakness: CWE-918
Affected product: Frappe Erpnext
Published: 2026-04-08
Last modified: 2026-07-25

Description

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.

Frequently asked questions

What is CVE-2026-31017?: 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.
How severe is CVE-2026-31017?: CVE-2026-31017 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2026-31017 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-31017?: CVE-2026-31017 primarily affects Frappe Erpnext. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-31017?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-31017 have an EU (EUVD) identifier?: Yes. CVE-2026-31017 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20511.
When was CVE-2026-31017 published?: CVE-2026-31017 was published on 2026-04-08 and last updated on 2026-07-25.

References

https://github.com/PhDg1410/CVE/tree/main/CVE-2026-31017

EU advisories (EUVD)

http://frappe.com

Affected products (2)

cpe:2.3:a:frappe:erpnext:16.0.1:*:*:*:*:*:*:*
cpe:2.3:a:frappe:frappe:16.1.1:*:*:*:*:*:*:*

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