F5 rushes out emergency NGINX patches for three critical flaws

F5 NGINX flaw lets attackers run code. F5 has released emergency out-of-band patches for three critical NGINX flaws: CVE-2026-15176, CVE-2026-97205, and CVE-2026-93479. These flaws could allow attackers to crash systems or launch denial of service attacks. F5 says no evidence of exploitation in the wild has been found. Upgrade NGINX Plus to a fixed version.

Zero Day Brief #29 · 20 Oct 2026

Sources

• CSO Online

Story so far

1. 2026-10-15 NGINX Fixes 5 Flaws, Including Possible RCE and a TLS Bug That May Skip Client-Cert Checks – The Hacker News
   first report, patch / fix released
2. 2026-10-16 F5 addressed critical RCE flaws in NGINX – Security Affairs
3. 2026-10-19 F5 releases out-of-band patches for critical NGINX vulnerabilities – BleepingComputer
4. 2026-10-20 F5 rushes out emergency NGINX patches for three critical flaws – CSO Online
   new CVE: CVE-2026-97205

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