CVE-2026-31017: A Server-Side Request Forgery (SSRF) vulnerability exists in the Print Format functionality of ERPNext v16.0.1

This month

CRITICAL 9.1REMOTEDOWNGRADEDOWNGRADE

CVE-2026-31017 is a critical-severity flaw (CVSS 9.1) affecting erpnext, frappe. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

Critical severity
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 85%)
CISA exploited list	No
Weakness	CWE-918
Published	2026-04-08
Last modified	2026-07-25

Publisher (CNA): MITRE · Vendor: frappe

Last updated 2026-07-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-08 17:21 UTCPublished CVE record published
2026-07-25 10:10 UTCUpdated Record last modified

frappe erpnext DOWNGRADE

Affected: 16.0.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 16.0.1

1. Check installed version

apt-cache policy erpnext || rpm -q erpnext || erpnext --version

2. No fixed release: DOWNGRADE to a release before 16.0.1 (Debian / Ubuntu)

apt-cache madison erpnext sudo apt install erpnext=<VERSION_BEFORE_16.0.1> sudo apt-mark hold erpnext

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list erpnext sudo dnf downgrade erpnext-<VERSION_BEFORE_16.0.1> sudo dnf versionlock add erpnext

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

frappe frappe DOWNGRADE

Affected: 16.1.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 16.1.1

1. Check installed version

apt-cache policy frappe || rpm -q frappe || frappe --version

2. No fixed release: DOWNGRADE to a release before 16.1.1 (Debian / Ubuntu)

apt-cache madison frappe sudo apt install frappe=<VERSION_BEFORE_16.1.1> sudo apt-mark hold frappe

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list frappe sudo dnf downgrade frappe-<VERSION_BEFORE_16.1.1> sudo dnf versionlock add frappe

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-31017?

erpnext: downgrade or apply the listed mitigation; frappe: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-31017 being exploited?

CVE-2026-31017 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-31017 affect?

CVE-2026-31017 affects erpnext, frappe. Severity is critical (CVSS 9.1). 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 generatin

How urgent is CVE-2026-31017?

Priority 40/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-44442 CRITICAL 9.9 UPGRADE ERPNext is a free and open source Enterprise Resource Planning tool
CVE-2026-44447 HIGH 8.8 UPGRADE ERPNext is a free and open source Enterprise Resource Planning tool
CVE-2026-44446 HIGH 8.8 UPGRADE ERPNext is a free and open source Enterprise Resource Planning tool
CVE-2026-44440 MEDIUM 6.5 UPGRADE ERPNext is a free and open source Enterprise Resource Planning tool
CVE-2026-44445 MEDIUM 6.5 UPGRADE ERPNext is a free and open source Enterprise Resource Planning tool

References

← Back to latest CVEs