CVE-2026-82251 in gitoxide
Summary
by MITRE • 08/28/2026
gitoxide before 0.52.1 fails to validate submodule names from .gitmodules configuration, allowing path traversal when deriving submodule git directories. Attackers can craft malicious submodule names with traversal segments to redirect state() and open() functions to repositories outside .git/modules, causing repository confusion and inspection of attacker-controlled repositories.
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Analysis
by VulDB Data Team • 08/28/2026
The vulnerability identified in versions of gitoxide prior to 0.52.1 represents a critical failure in input validation within the submodule handling subsystem. Specifically, the library does not adequately sanitize or validate the names provided in .gitmodules configuration files before using them to construct file system paths for locating submodule repositories. This lack of rigorous path normalization allows an attacker who controls the content of a repository's .gitmodules file to inject directory traversal sequences, such as ../, into the submodule name field. When gitoxide processes this maliciously crafted configuration, it fails to recognize that these segments are intended to escape the designated module storage area, leading directly to improper access control and path manipulation issues classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory.
The technical mechanism of exploitation relies on how gitoxide derives the absolute paths for submodule repositories using standard library functions like state() and open(). Under normal operation, these functions are expected to resolve paths strictly within the .git/modules directory structure associated with the main repository. However, due to the absence of validation against traversal characters, the path resolution logic incorporates the attacker-controlled segments into the final file system target. This results in the application attempting to read or write data from directories that exist outside the intended sandboxed environment of the git modules storage. The core flaw is a classic directory traversal vulnerability where insufficient sanitization of user-supplied input leads to unauthorized access to arbitrary files and directories on the host file system.
The operational impact of this vulnerability extends beyond simple information disclosure, potentially leading to significant repository confusion and integrity compromise. By redirecting state() and open() calls to attacker-controlled repositories or sensitive configuration files outside the .git/modules scope, an adversary can manipulate how gitoxide interprets the repository structure. This could allow for the injection of malicious objects, alteration of remote configurations, or exfiltration of private keys if they reside in accessible parent directories. In a CI/CD pipeline context where automated tools process untrusted repositories, this flaw could be leveraged to execute arbitrary code indirectly by forcing the tool to load and parse malicious git objects from an external location that mimics legitimate repository structures but contains harmful payloads.
From a threat intelligence perspective, this vulnerability aligns with ATT&CK technique T1552: Unsecured Credentials if it leads to key theft, or more broadly with lateral movement techniques where compromised tools are used to access restricted resources within a trusted environment. The lack of strict path validation is a common pitfall in systems that handle complex hierarchical data structures like git repositories, highlighting the necessity for defense-in-depth strategies when processing external configuration files. Mitigation requires immediate upgrading to version 0.52.1 or later where this input validation has been corrected. Additionally, developers integrating gitoxide should implement additional application-level checks if they are handling highly untrusted inputs in environments with strict security requirements, ensuring that all path components are canonicalized and verified against a whitelist of allowed directories before any file system operations are performed.