CVE-2025-59532
HighPublished
Codex has sandbox bypass due to bug in path configuration logic
- Published
- Sep 22, 2025
- Updated
- Sep 23, 2025
- Assigning CNA
- GitHub_M
- Evidence observed
- Aug 6, 2026
Primary CVSS
8.6/ 10High
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Codex has sandbox bypass due to bug in path configuration logic
nvd · CVSS 4.0
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XLow · next 30 days
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
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.
A Docker-based research environment for analyzing CVE-2025-59532, a path traversal vulnerability in OpenAI Codex CLI that allows arbitrary file write outside the intended workspace sandbox. Part of CMU Course : 18-739 Hacking & Offensive Security in Fall 2025
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