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.
Published: 2026-09-01
Score: n/a
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

Vendor 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.

Vendor Workaround

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

Tracking

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Advisories

No advisories yet.

References
Link Providers
https://github.com/openai/codex/pull/22652 cve-icon cve-icon
History

Wed, 02 Sep 2026 00:45:00 +0000

Type Values Removed Values Added
Title Codex CLI and Desktop execute attacker‑controlled Git fsmonitor helper with user privileges

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

Subscriptions

No data.

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

Updated: 2026-09-02T00:30:04Z

Weaknesses