CVE-2026-59510 in AIL Framework
Summary
by MITRE • 07/05/2026
AIL Framework contains a path traversal vulnerability in its PDF object handling. Prior to commit 14c618fce4d1df02358717c48ea903706abecdf2, the PDF.get_filepath() function constructed a file path by joining the configured PDF storage directory with a path derived from a PDF object identifier, without verifying that the resolved path remained within the intended PDF_FOLDER directory.
An authenticated attacker able to invoke PDF object operations with a crafted identifier could use relative traversal sequences or absolute path components to cause AIL Framework to open files located outside the PDF storage directory. This could allow disclosure of files readable by the AIL process, including application configuration, credentials, or other sensitive local data. This vulnerability is potential due to additional errors before being able to be executed.
The fix canonicalises the resulting path with os.path.realpath() and rejects paths whose common directory is outside the configured PDF directory.
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Analysis
by VulDB Data Team • 07/06/2026
The AIL Framework vulnerability represents a critical path traversal flaw that emerged from insufficient input validation within its PDF object handling mechanism. This weakness specifically manifests in the PDF.get_filepath() function where the application constructs file paths by concatenating a configured storage directory with user-provided identifiers derived from PDF objects. The vulnerability stems from the absence of proper path normalization and containment checks that would normally prevent directory traversal attacks. According to CWE-22, this constitutes a classic path traversal vulnerability where an attacker can manipulate file system access through carefully crafted input sequences.
The operational impact of this vulnerability extends beyond simple file disclosure, as it enables authenticated attackers with PDF object manipulation capabilities to navigate outside the intended storage boundaries. When an attacker crafts a malicious PDF object identifier containing relative traversal sequences such as "../" or absolute path components, the application fails to validate that the resulting path remains within the designated PDF_FOLDER directory. This flaw allows for unauthorized access to sensitive files that are readable by the AIL process, potentially exposing configuration files, credential stores, and other locally stored confidential information.
Security practitioners should recognize this vulnerability through the lens of ATT&CK technique T1059.007, which covers path traversal attacks targeting file systems. The vulnerability's exploitation requires an authenticated session and specific knowledge of the application's internal PDF object handling, making it less likely to be exploited by casual attackers but still dangerous for those with legitimate access. The fix implemented addresses this issue by employing os.path.realpath() to canonicalize the resulting paths and establishing a strict validation mechanism that rejects any path whose common directory falls outside the configured PDF storage area.
The remediation approach taken by the AIL Framework developers aligns with industry best practices for preventing path traversal attacks, specifically implementing proper path normalization followed by containment verification. This solution prevents attackers from using symbolic links or other path manipulation techniques to escape the intended directory boundaries. The fix ensures that regardless of input complexity, all file operations remain confined to the designated storage area, thereby protecting sensitive application data from unauthorized disclosure. This defensive measure represents a standard security control pattern that should be applied across all file system access points where user input influences file paths.
The vulnerability's potential for exploitation highlights the importance of input validation in web applications and framework components that handle file operations. While the attack vector requires authentication, the impact can be severe given that many applications store sensitive configuration data within their file systems. The fix demonstrates how simple path canonicalization combined with directory containment checks provides effective protection against this class of vulnerability. Organizations should ensure similar protections are implemented in all components that process user-provided paths, particularly in frameworks handling document processing or file management operations where the risk of path traversal attacks remains significant.