CVE-2026-41482 in Frappe
Summary
by MITRE • 07/10/2026
Frappe is a full-stack web application framework. Prior to 16.18.3, possible path traversal and local file inclusion were possible through secure local resource access in the Chrome PDF Generator. This issue is fixed in version 16.18.3.
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Analysis
by VulDB Data Team • 07/11/2026
The vulnerability identified in Frappe frameworks prior to version 16.18.3 represents a critical security flaw that exposes applications to path traversal and local file inclusion attacks through the Chrome PDF Generator component. This issue arises from inadequate input validation and improper handling of file paths when processing local resource access requests. The vulnerability stems from the framework's failure to properly sanitize user-supplied parameters that are used to determine file locations during PDF generation processes, creating an attack surface where malicious actors can manipulate file path resolution to access unauthorized system resources.
The technical implementation of this vulnerability allows attackers to exploit weak input validation mechanisms within the Chrome PDF Generator module. When users submit requests for PDF generation that include local file references, the framework fails to properly validate or sanitize these inputs before processing them through the underlying file system operations. This creates a path traversal condition where attacker-controlled input can navigate beyond intended directories and access sensitive files on the server. The vulnerability is classified under CWE-22 Path Traversal and CWE-98 Local File Inclusion, both of which are well-documented in the Common Weakness Enumeration catalog as critical security flaws that enable unauthorized file access.
Operationally, this vulnerability presents significant risks to organizations using Frappe frameworks, particularly those handling sensitive data or operating in regulated environments. Attackers could potentially access configuration files, database credentials, application source code, and other confidential information stored on the server filesystem. The impact extends beyond simple data theft as malicious actors could also execute arbitrary code or cause denial of service conditions by accessing system resources. This vulnerability aligns with ATT&CK technique T1566.002 for credential access through exploitation of web applications and T1083 for file and directory discovery, making it a multi-faceted threat that can be leveraged for further compromise.
The remediation for this vulnerability requires upgrading to Frappe version 16.18.3 or later, which implements proper input validation and sanitization mechanisms for local resource access. Security best practices recommend implementing strict input validation that filters or rejects potentially malicious path components including double dots, forward slashes, and backslashes. Organizations should also consider implementing additional security controls such as principle of least privilege for file system access, regular security scanning of application components, and monitoring for suspicious file access patterns. The fix addresses the root cause by ensuring that all user-supplied file path parameters are properly validated against a whitelist of allowed directories or through proper canonicalization techniques that prevent directory traversal attacks.