CVE-2026-0303 in Checkov
Summary
by MITRE • 09/10/2026
A code execution vulnerability in Palo Alto Networks Checkov by Prisma® Cloud can allow arbitrary code execution when Checkov scans a directory that contains an attacker-controlled configuration file.
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Analysis
by VulDB Data Team • 09/10/2026
The identified security flaw resides within the static analysis tooling component of the Palo Alto Networks Prisma Cloud suite, specifically affecting the Checkov engine used for infrastructure-as-code scanning. This vulnerability represents a critical risk vector because it targets the automated validation processes that organizations rely on to ensure their cloud environments adhere to security best practices before deployment. The core issue stems from insufficient sanitization and validation mechanisms when processing configuration files located within scanned directories. When an attacker gains write access or control over any file within a directory targeted for scanning, they can inject malicious payloads disguised as legitimate infrastructure-as-code artifacts such as Terraform plans, Kubernetes manifests, or CloudFormation templates.
From a technical perspective, the vulnerability exploits the way Checkov parses and executes logic embedded within these configuration files. While static analysis tools are generally designed to be read-only evaluators of code structure and policy compliance, this specific implementation flaw allows for arbitrary command execution during the parsing phase. This typically occurs through unsafe deserialization practices or improper handling of dynamic evaluation contexts where user-supplied input is executed without adequate sandboxing or restriction. The attacker can craft a configuration file that triggers internal functions to run system commands with the privileges under which the Checkov process operates, effectively bypassing standard security boundaries and gaining remote code execution capabilities on the host machine running the scanner.
The operational impact of this vulnerability is severe due to its potential for lateral movement within an organization's DevOps pipeline. Since infrastructure-as-code scanners are often integrated into continuous integration and continuous deployment pipelines with elevated privileges to access sensitive cloud credentials, successful exploitation could allow an attacker to compromise not only the immediate host but also connected cloud environments. This aligns closely with CWE-94 Improper Control of Generation of Code or Command, as it involves the injection of malicious code that is then executed by a trusted application. Furthermore, this attack vector maps directly to MITRE ATT&CK technique T1059 Command and Scripting Interpreter, specifically through mechanisms like OS command injection via configuration files, which enables adversaries to establish persistence, exfiltrate data, or disrupt critical infrastructure services.
Mitigation strategies must focus on both immediate remediation and long-term architectural hardening. Palo Alto Networks has released patches that address the underlying parsing logic flaws; therefore, organizations should immediately update their Checkov instances to the latest secure version. In addition to patching, it is crucial to enforce strict access controls over directories containing infrastructure-as-code files to prevent unauthorized modifications by non-privileged users or compromised services. Implementing integrity monitoring solutions can detect unexpected changes to configuration files before they are scanned. Furthermore, adopting a principle of least privilege for the execution environment of static analysis tools ensures that even if exploitation occurs, the blast radius is contained and does not lead to full system compromise. Regular audits of third-party dependencies within scanning pipelines also help in identifying similar vulnerabilities across the software supply chain.