What’s Vulnerable › Vulnerabilities

CVE-2026-40034: gitoxide - Command Injection via Partial .gitmodules Override in gix-submodule

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-26 · updated 2026-10-08
• Weakness: CWE-77

Description

gix-submodule before 0.29.0 (gitoxide before 0.5.21, gix before 0.84.0) incorrectly validates the update field in .gitmodules, allowing attackers to bypass the CommandForbiddenInModulesConfiguration guard when a submodule has been initialized with only partial configuration in .git/config. An attacker can inject arbitrary shell commands via the update field in .gitmodules that will be executed when Submodule::update() is called on a previously-initialized submodule, enabling remote code execution.

Affected products

• gitoxide: before 0.5.21 — fixed in 0.5.21
• gitoxide gix: before 0.84.0 — fixed in 0.84.0
• gitoxide gix-submodule: before 0.29.0 — fixed in 0.29.0

How to fix

Upgrade to a fixed version: gitoxide 0.5.21; gitoxide gix 0.84.0; gitoxide gix-submodule 0.29.0. Check the vendor advisory for mitigations.

References

• https://github.com/GitoxideLabs/gitoxide/commit/6a2e6a436f76c8bbf2487f9967413a51356667a0
• https://github.com/GitoxideLabs/gitoxide/commit/dd5c18d9e526e8de462fa40aa047acd097cfa7dc
• https://github.com/GitoxideLabs/gitoxide/security/advisories/GHSA-f26g-jm89-4g65
• https://red.anthropic.com/2026/cvd/findings/ANT-2026-6SNS6KMP
• https://www.vulncheck.com/advisories/gitoxide-command-injection-via-partial-gitmodules-override-in-gix-submodule
• https://github.com/GitoxideLabs/gitoxide/security/advisories/GHSA-f26g-jm89-4g65

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