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CVSS estimates technical severity, but it does not automatically equal business risk. Prioritize using context like internet exposure, asset criticality, known exploitation, and whether compensating controls exist. A Medium CVSS on an exposed production system can be more urgent than a Critical on an isolated non-production host.

Vulnerability Database

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A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

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A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. Risk increases sharply when exploitation becomes reliable or widespread.

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Q: How do we prioritize remediation without burning out the team?

Use a repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress so remediation is steady, not reactive.

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351,760

Total vulnerabilities in the database

gix and gitoxide: unvalidated submodule name traverses out of .git/modules and redirects state() / open() to another repository — gitoxide

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Summary

attachments: pocs.zip

Submodule names coming from .gitmodules are exposed as unvalidated names and are later reused to derive the submodule git directory as:

&lt;superproject common_dir&gt;/modules/&lt;submodule name&gt;

Because the submodule name is joined directly as a filesystem path component, a name such as ../../../escaped-target.git escapes .git/modules after normalization. The current implementation then uses that escaped path in both state() and open().

The updated PoC demonstrates the real sink, not just string construction:

state() reports repository_exists=true for the traversed path;
open() returns a repository whose normalized common_dir() matches the attacker-chosen repository outside .git/modules.

Root cause analysis

The relevant flow is:

gix-submodule/src/access.rs exposes unvalidated submodule names from configuration.
gix/src/submodule/mod.rs derives the git directory by doing common_dir().join("modules").join(name) with no confinement check.
gix/src/submodule/mod.rs uses that derived path during state resolution and repository opening.

There is no normalization-and-confinement step between “submodule name from configuration” and “filesystem path used for repository existence checks / open.” As a result, traversal segments in the submodule name directly influence which repository path is inspected and opened.

Reproduce steps

Use the attached PoC zip that contains the pocs/ workspace.

Unzip the PoC archive.
Enter pocs/F002.
Run:
cargo run --quiet
Compare the output with pocs/F002/result.txt.

Key outputs are:

submodule_name=../../../escaped-target.git
derived_git_dir_raw=.../.git/modules/../../../escaped-target.git
derived_git_dir_normalized=.../artifacts/escaped-target.git
escaped_target=.../artifacts/escaped-target.git
repository_exists=true
submodule_opened=true
opened_common_dir_normalized=.../artifacts/escaped-target.git
normalized_git_dir_matches_target=true
opened_common_dir_matches_target=true
target_outside_modules_root=true

These outputs show that gitoxide is not only constructing a traversable path string. It is actually using the escaped path for repository existence checks and for opening a repository object.

Impact

Confirmed impact:

a malicious submodule name can redirect submodule state inspection away from .git/modules/<name> to an attacker-chosen repository path outside .git/modules;
Submodule::state() can report repository existence for the wrong repository;
Submodule::open() can return a repository object backed by that attacker-chosen path.

This is best described as a path-traversal / repository-confusion issue in submodule repository resolution.

This report does not claim command execution from this behavior alone. The demonstrated impact is repository redirection: callers that enumerate, inspect, or operate on submodules can be steered into using the wrong repository.

Recommended fix

Two complementary fixes are advisable:

do not reuse raw submodule names as filesystem path fragments;
- either use a validated/sanitized name for filesystem derivation,
- or derive the storage path from a safe identifier instead of the user-controlled name;
add an explicit confinement check after path derivation;
- normalize or canonicalize the candidate path,
- verify that the result stays under <common_dir>/modules,
- reject names that contain traversal segments, path separators, or any representation that can escape the modules root.

In short, submodule names may remain opaque configuration identifiers, but they should not be treated as trusted filesystem subpaths.

Published: May 5, 2026
Updated: May 6, 2026
GHSA: GHSA-fr8x-3vfx-f45h
Severity: High
Exploit:
CISA KEV:

No technical information available.

CWEs:

CWE-22

OWASP TOP 10:

A5 - Broken Access Control

Affected Software
References

Software	From	Fixed in
gitoxide	-	0.52.1
gix	-	0.83.0

https://github.com/GitoxideLabs/gitoxide/security/advisories/GHSA-fr8x-3vfx-f45h

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Frequently Asked Questions

What is a Vulnerability (CVE) and why does it matter?

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.

Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.

Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.

SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.