CVE-2026-97205 vulnerability in F5 Networks Products
Published on October 14, 2026
NGINX ngx_http_core_module vulnerability
NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_core_module module. When asynchronous file I/O (AIO) is enabled in certain configurations, processing a Server Side Includes (SSI) page containing include virtual commands may trigger a Use-After-Free (UAF) in the NGINX worker process. This may cause memory corruption or a worker process crash. Additionally, attackers can execute code on systems with Address Space Layout Randomization (ASLR) disabled or when the attacker can bypass ASLR.
Impact:
This vulnerability may allow remote attackers to cause a denial-of-service (DoS) on the NGINX system, corrupt its memory, or possibly trigger code execution. There is no control plane exposure; this is a data plane issue only.
Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Vulnerability Analysis
CVE-2026-97205 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.
Weakness Type
What is a Dangling pointer Vulnerability?
Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.
CVE-2026-97205 has been classified to as a Dangling pointer vulnerability or weakness.
Products Associated with CVE-2026-97205
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Affected Versions
F5 NGINX Plus:- Version 37.1.0 and below 37.1.0.1 is affected.
- Version 37.0.0 and below 37.0.5.1 is affected.
- Version R36 and below * is affected.
- Version R35 and below * is affected.
- Version R34 and below * is affected.
- Version R33 and below * is affected.
- Version 1.31.0 and below 1.31.7 is affected.
- Version 1.30.0 and below 1.30.6 is affected.