What is the CVSS score of CVE-2026-16766?

CVE-2026-16766 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.7%.

Is there a patch available for CVE-2026-16766?

Yes, a patch is available for CVE-2026-16766. Update the affected software to the latest version immediately.

Catalyst CVE-2026-16766

EUVD-2026-48767 CRITICAL

OS Command Injection (CWE-78)

2026-07-25 CPANSec

Command Injection Catalyst Rrwo

9.8

CVSS 3.1 · Vendor: CPANSec

View

Vulnerability Assessment

Weakness

CWE

CWE-78

OWASP Top 10:2025

A05:2025 - Injection

ASVS 5.0

V1 - Encoding and Sanitization OS command sanitization, avoid shell exec

MITRE ATT&CK

2 techniques across 1 tactic: Execution

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.

Patch available 0.7% exploitation probability (EPSS)

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AnalysisAIv1 – Jul 28, 2026

Remote code execution in Catalyst::View::Wkhtmltopdf before 0.6.1 allows unauthenticated attackers to inject arbitrary shell commands via unsanitized PDF render options such as page_size, orientation, or margins. The incomplete fix in 0.6.0 still permits injection. CVSS 9.8, EPSS 0.67% (moderate probability), CISA SSVC indicates automatable and total impact, but no active exploitation reported.

Affected VersionsENISA

Catalyst::View::Wkhtmltopdf 0 <0.6.1

Affected Packages

euvd catalyst_view_wkhtmltopdf fix: 0.6.1

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (CPANSec) PRIMARY 9.8 CRITICAL

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from Vendor (CPANSec) · only source for this CVE.

CVSS VectorVendor: CPANSec

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

CVSS changed

Jul 27, 2026 - 16:22 NVD

9.8 (CRITICAL)

Patch available

Jul 25, 2026 - 10:18 EUVD

CVE Published

Jul 25, 2026 - 08:12 cve.org

UNKNOWN (no severity yet)

CVE Published

Jul 25, 2026 - 08:12 cve.org

CRITICAL 9.8

DescriptionCVE.org

Catalyst::View::Wkhtmltopdf versions before 0.6.1 for Perl allow shell command injection (RCE) via PDF render options.

Options are passed directly to the wkhtmltopdf command without sanitization.

Any web application that passes user-controlled options such as the page_size, orientation or margins without validation allows shell command injection.

Version 0.6.0 was released with an incomplete fix for this issue.

Note that the wkhtmltopdf project is no longer being developed, and users of this package should migrate to alternative solutions.

Threat Intelligence Overview

EPSS Score

0.7%

Top 52% exploitable

Data Quality

7 sources

Confidence: High

EUVD

NVD

CVE.org

EPSS

Vulnrichment

GitHub

VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity CRITICAL

CISA KEV No

Public POC No

EPSS 0.7%

Patch available Yes

Active threat No

Deciding rule

CRITICAL severity

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.