What is CVE-2026-40034?

CVE-2026-40034 is a high-severity vulnerability in Gitoxide, classified under Command Injection. CVSS score: 7.8/10. Published 2026-05-26.

How severe is CVE-2026-40034?

High severity. CVSS v3 base score is 7.8 out of 10.

RCE in Gitoxide

CVE-2026-40034

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 initiali…

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.000 (5.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Gitoxide — versions 0.82.0, 0.5.21, 0
Gitoxide Gix — versions 0, 0.84.0
Gitoxide Gix-submodule — versions 0, 0.29.0

Weakness classification (CWE)

CWE-77 — Command Injection

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (third-party-advisory)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-40034?: CVE-2026-40034 is a high-severity vulnerability in Gitoxide, classified under Command Injection. CVSS score: 7.8/10. Published 2026-05-26.
How severe is CVE-2026-40034?: High severity. CVSS v3 base score is 7.8 out of 10.