CVE-2026-82252 in Gitoxide
Summary
by MITRE • 08/28/2026
gitoxide before 0.52.1 follows symlinks when reading the worktree .gitmodules file, allowing attackers to inject out-of-repository bytes into submodule metadata. Attackers can create a malicious repository with a symlinked .gitmodules pointing outside the repository tree, causing gitoxide to parse arbitrary external files as submodule configuration and expose attacker-controlled name, path, and url values.
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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 significant security flaw related to how the library handles symbolic links during the parsing of Git repository metadata. Specifically, when reading the .gitmodules file from the working tree, the software incorrectly follows symlinks rather than treating them as opaque data or restricting access to within-repository paths. This behavior allows an attacker who controls a malicious repository to craft a .gitmodules entry that is not a regular file but instead a symbolic link pointing to an arbitrary location on the host filesystem outside of the repository's directory tree. When gitoxide processes this configuration, it dereferences the symlink and reads the contents of the target external file as if they were legitimate submodule definitions.
This technical flaw enables information disclosure and potential code injection scenarios by exposing attacker-controlled values for critical submodule attributes such as name, path, and url. By pointing the .gitmodules symlink to sensitive system files or other repositories containing controlled content, an adversary can force gitoxide to parse arbitrary external data structures into its internal representation of submodule metadata. This effectively bypasses standard repository isolation boundaries, allowing out-of-repository bytes to be injected directly into the application's state regarding remote resources and local paths. The operational impact is severe for applications relying on gitoxide to safely process untrusted Git repositories, as it can lead to unauthorized access to sensitive files or manipulation of subsequent operations that rely on these parsed values, such as cloning submodules from attacker-specified URLs.
From a classification perspective, this vulnerability aligns with CWE-22: Improper Limitation of a Pathname to a Restricted Directory, commonly known as path traversal. The failure to validate that the .gitmodules file resides within the expected repository scope before processing its contents constitutes an insufficient restriction on resource access. Furthermore, in the context of the MITRE ATT&CK framework, this behavior facilitates Initial Access and potentially Command and Control if the parsed URL values are subsequently used to fetch or execute remote code without proper validation. The lack of strict boundary enforcement allows external inputs to influence internal application logic through metadata parsing mechanisms that should be isolated from arbitrary filesystem reads.
To mitigate this risk, users must upgrade gitoxide to version 0.52.1 or later where the issue has been resolved by enforcing stricter path constraints during submodule configuration parsing. Developers integrating gitoxide into their applications should also implement additional defensive measures such as validating all parsed URLs against allowlists and ensuring that any file reads associated with repository metadata are confined strictly within the bounds of the checked-out working directory. Regular auditing of dependencies for similar symlink-following behaviors in other Git-related libraries is recommended to maintain a robust security posture against filesystem-based attacks targeting version control tools.