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.
History

Tue, 20 Oct 2026 15:15:00 +0000

Type Values Removed Values Added
First Time appeared F5
F5 nginx Open Source
F5 nginx Plus
Vendors & Products F5
F5 nginx Open Source
F5 nginx Plus

Fri, 16 Oct 2026 12:30:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Important


Thu, 15 Oct 2026 23:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 14 Oct 2026 15:00:00 +0000

Type Values Removed Values Added
Description 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.
Title NGINX ngx_http_core_module vulnerability
Weaknesses CWE-416
References
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 9.2, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: f5

Published: 2026-10-14T14:40:27.487Z

Updated: 2026-10-15T10:31:15.547Z

Reserved: 2026-09-30T21:56:14.607Z

Link: CVE-2026-97205

cve-icon Vulnrichment

Updated: 2026-10-15T10:29:28.871Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-14T15:17:28.200

Modified: 2026-10-15T11:18:08.670

Link: CVE-2026-97205

cve-icon Redhat

Severity : Important

Publid Date: 2026-10-14T14:40:27Z

Links: CVE-2026-97205 - Bugzilla