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THREAT OPS › Threat News › ZDI-26-648: (Pwn2Own) OpenAI Codex External Control of System or Configuration Setting Remote Code Execution Vulnerability

ZDI-26-648: (Pwn2Own) OpenAI Codex External Control of System or Configuration Setting Remote Code Execution Vulnerability

medzdi_publishedPublished 2026-09-10

This vulnerability allows remote attackers to execute arbitrary code on affected installations of OpenAI Codex. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The ZDI has assigned a CVSS rating of 7.8. The following CVEs are assigned: CVE-2026-19590.

MITRE ATT&CK techniques

Malicious FileT1204.002

Indicators of compromise

CVE-2026-19590cve

Original source: http://www.zerodayinitiative.com/advisories/ZDI-26-648/