Arbitrary Command Injection Affecting codex package, versions <0.149.0-r0


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.65% (50th percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-CODEX-19165775
  • published22 Aug 2026
  • disclosed26 May 2026

Introduced: 26 May 2026

CVE-2026-40034  (opens in a new tab)
CWE-77  (opens in a new tab)

How to fix?

Upgrade Chainguard codex to version 0.149.0-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream codex package and not the codex package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1