OpenAI Codex CLI for Windows, macOS, and Linux and Codex Desktop for Windows and macOS automatically collected Git repository metadata without disabling the repository-local core.fsmonitor setting. If a user opens or uses an attacker-prepared repository whose preserved .git/config sets core.fsmonitor to an attacker-controlled filesystem-monitor helper, Git can execute that helper while Codex collects repository metadata. The helper runs outside Codex's command sandbox and without a user-approval prompt, allowing attacker-controlled code to run with the user's privileges. The code can read, change, or delete the user's files and access other resources available to the user's account. An ordinary Git clone does not preserve the source repository's local .git/config; exploitation requires a repository delivered or copied with that configuration intact.

Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

Upgrade Codex CLI to version 0.131.0 or later; Codex Desktop for macOS to application version 26.519.22136 or later; and Codex Desktop for Windows to application version 26.519.21041 (Microsoft Store package 26.519.2081.0) or later.


Workaround

Until updated, do not open or use repository archives or copied directories that preserve attacker-controlled .git/config.

References
History

Tue, 01 Sep 2026 22:00:00 +0000

Type Values Removed Values Added
Description OpenAI Codex CLI for Windows, macOS, and Linux and Codex Desktop for Windows and macOS automatically collected Git repository metadata without disabling the repository-local core.fsmonitor setting. If a user opens or uses an attacker-prepared repository whose preserved .git/config sets core.fsmonitor to an attacker-controlled filesystem-monitor helper, Git can execute that helper while Codex collects repository metadata. The helper runs outside Codex's command sandbox and without a user-approval prompt, allowing attacker-controlled code to run with the user's privileges. The code can read, change, or delete the user's files and access other resources available to the user's account. An ordinary Git clone does not preserve the source repository's local .git/config; exploitation requires a repository delivered or copied with that configuration intact.
Weaknesses CWE-15
References

Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: OAI

Published:

Updated: 2026-09-01T19:19:51.977Z

Reserved: 2026-08-12T03:54:37.942Z

Link: CVE-2026-19592

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-01T18:17:40.370

Modified: 2026-09-01T21:03:04.987

Link: CVE-2026-19592

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses