OpenAI GPT-5.2-Codex Supercharges Agentic Coding and Cyber Vulnerability Detection

In Cybersecurity News - Original News Source is cybersecuritynews.com by Blog Writer

OpenAI has unveiled GPT-5.2-Codex, a cutting-edge model optimized for agentic coding and enhanced cybersecurity tasks. The release highlights breakthroughs in handling complex software engineering and vulnerability detection.

GPT-5.2-Codex tops SWE-Bench Pro with 56.4% accuracy, outperforming GPT-5.2 at 55.6% and GPT-5.1 at 50.8%. On Terminal-Bench 2.0, it scores 64.0%, surpassing prior versions like GPT-5.2’s 62.2%. These gains stem from improved long-context handling, tool use, and native compaction for extended coding sessions.​

Benchmark GPT-5.2-Codex GPT-5.2 GPT-5.1-Codex-Max
SWE-Bench Pro 56.4% ​ 55.6%​ 50.8% ​
Terminal-Bench 2.0 64.0% ​ 62.2% ​ 58.1% ​

The model excels in professional Capture-the-Flag challenges, showing sharp capability jumps over predecessors. It supports fuzzing, test environment setup, and attack surface analysis, accelerating defensive workflows. OpenAI notes stronger safeguards despite dual-use risks, staying below “High” cyber capability per its Preparedness Framework.​

A researcher using GPT-5.1-Codex-Max uncovered flaws in React Server Components while probing CVE-2025-55182, a critical RCE (CVSS 10.0) fixed December 3.

This led to CVE-2025-55183 (source code exposure, CVSS 5.3), CVE-2025-55184, and CVE-2025-67779 (DoS, CVSS 7.5), disclosed December 11. The process involved iterative prompting, local setups, and fuzzing, as diagrammed in shared visuals.​

GPT-5.2-Codex launches for paid ChatGPT Codex users, with API access soon. An invite-only pilot targets vetted cybersecurity pros for defensive tasks like red-teaming. OpenAI pairs advances with model safeguards and community collaboration to curb misuse.​

This evolution equips developers and defenders against rising threats in codebases and infrastructure. React patches urge upgrades to versions like 19.0.3+.

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