Is CVE-2026-40034 actively exploited?

No active exploitation of CVE-2026-40034 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-40034 be exploited remotely?

No. CVE-2026-40034 requires local access to exploit.

What is the CVSS score of CVE-2026-40034?

CVE-2026-40034 has a CVSS score of 7.8 (HIGH).

HOME VULNERABILITIESCVE-2026-40034

HIGH

CVE-2026-40034

CWE-77Published: May 26, 2026· Updated: May 28, 2026

7.8

CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2026-40034 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.8.