OpenAI Launches GPT-5.6-Cyber with Reduced Safeguards for Exploit Development
OpenAI released GPT-5.6-Cyber for vulnerability research and pentesting via Daybreak Red, completing 95% of advanced cyber task evaluations.
GPT-5.6-Cyber, built on GPT-5.6 Sol, targets zero-day discovery, exploit chain development and incident response with reduced refusals, scoring 95.0% on OpenAI's Advanced Cybersecurity Completion Rate versus 1.5% for GPT-5.6 Sol and 57.3% for GPT-5.5-Cyber. The model found CVE-2026-15903 (CVSS 8.8), an out-of-bounds read/write in Chrome's V8 JavaScript engine that Google patched in mid-July 2026. It is available to trusted partners including CrowdStrike, Palo Alto Networks and Cloudflare through the Daybreak Red access tier.
- Outperformed GPT-5.6 Sol and GPT-5.5-Cyber on OpenAI's ExploitGym benchmark.
- Model found 400+ kernel privilege escalation flaws and five mobile OS vulnerabilities, OpenAI says.
- OpenAI notes it produces shorter, less detailed vulnerability reports than the general model.
- Trusted partners include CrowdStrike, Palo Alto Networks, Cloudflare, Fortinet and Accenture.
- CVEs
- CVE-2026-15903
- Products
- Daybreak Red
Vulnerabilities mentioned
All| CVE | Vulnerability | CVSS | EPSS | Signals | Published |
|---|---|---|---|---|---|
| CVE-2026-15903 | Out of bounds read and write in V8 in Google Chrome prior to 150.0.7871.128 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted… | 8.8 | <1% |
From the original article
4 min read at thehackernews.com
OpenAI on Monday unveiled a new cybersecurity-focused model called GPT‑5. 6‑Cyber that it said is focused on vulnerability research, penetration testing, and incident response. "Built on GPT‑5.
By @TheHackersNews · thehackernews.com
A short excerpt; the article and its images belong to the publisher. Summary, key facts and assessment above are AI-written from the article and can be wrong.