# CVE-2026-19592: Command injection in Codex CLI

> Attacker-controlled Git fsmonitor helper executes arbitrary code with user privileges when opening a malicious repository in Codex CLI or Desktop.

- **Severity:** High 7.3 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 1 Sep 2026
- **Updated:** 2 Sep 2026
- **Also known as:** GHSA-26wp-42v3-96xp

## What is CVE-2026-19592?

CVE-2026-19592 is a high-severity command injection vulnerability in OpenAI Codex CLI, published on 1 Sep 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official 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.

Weakness: CWE-15 (External Control of System or Configuration Setting)

## Which versions are affected by CVE-2026-19592?


## How do I fix CVE-2026-19592?

No fix has been published for CVE-2026-19592 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-19592 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-19592 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-19592 and fix it if it is affected.

What it is: CVE-2026-19592 is a high-severity command injection vulnerability in OpenAI Codex CLI, published on 1 Sep 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-19592 exists.

Affected product: OpenAI Codex CLI. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-19592/ (Markdown: https://insights.sbomify.com/CVE-2026-19592/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-19592
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-19592
- OSV: https://osv.dev/vulnerability/CVE-2026-19592

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-19592/
Summaries are generated and may contain mistakes; the official description above is the record.