CVE-2026-19590

Published Sep 1, 2026 CVSS 3.1 · 7.3 High EPSS < 1% KEV · Not listed
Description
OpenAI Codex Desktop for Windows and macOS could execute attacker-controlled Git hooks because automated Git operations trusted the repository's local core.hooksPath setting. If a user opens an attacker-prepared repository whose preserved .git/config points core.hooksPath to an attacker-controlled directory, Codex can run a malicious hook while processing the repository. The hook executes outside Codex's command sandbox, without user approval, and with the user's privileges, allowing it to 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 attacker-controlled repository-local configuration required for exploitation.

Remediation

Vendor Solution

Upgrade Codex Desktop for macOS to application version 26.519.22136 or later, or 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 untrusted repository archives or copied repository directories that preserve attacker-supplied .git/config.

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
References
History
Type Values Removed Values Added
Title Execution of attacker‑controlled Git hooks in OpenAI Codex Desktop
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.3, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Openai
Openai codex Desktop
Openai codex Desktop (microsoft Store Package)
Vendors & Products Openai
Openai codex Desktop
Openai codex Desktop (microsoft Store Package)
Type Values Removed Values Added
Title Execution of attacker‑controlled Git hooks in OpenAI Codex Desktop
Type Values Removed Values Added
Description OpenAI Codex Desktop for Windows and macOS could execute attacker-controlled Git hooks because automated Git operations trusted the repository's local core.hooksPath setting. If a user opens an attacker-prepared repository whose preserved .git/config points core.hooksPath to an attacker-controlled directory, Codex can run a malicious hook while processing the repository. The hook executes outside Codex's command sandbox, without user approval, and with the user's privileges, allowing it to 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 attacker-controlled repository-local configuration required for exploitation.
Weaknesses CWE-427
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
OAI
Published
Updated
Sep 3, 2026, 2:32 PM
Reserved
Aug 12, 2026, 3:54 AM
Status
Undergoing Analysis
Published
Sep 1, 2026, 6:17 PM
Modified
Sep 3, 2026, 3:17 PM