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CVE-2026-97205

8.1, high

F5 NGINX Plus Use-After-Free Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab)
CVSS
8.1, high high CVSS v3.1
EPSS, next 30 days
0.4% higher than 36.8% of scored CVEs
Exploitation
No public evidence
Published
14 Oct 20263 days ago

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.

Details

Vendor
F5
Product
NGINX Plus
Weakness
CWE-416 (opens in a new tab)
Status
Awaiting analysis
Updated
14 Oct 2026
Assigner
f5sirt@f5.com

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

References 1

Other references 1

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other F5 CVEs

Every F5 CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2026-94127 F5 BIG-IP APM Heap-based Buffer Overflow Vulnerability KEV EPSS 2% 9.8, critical
  • CVE-2025-53521 F5 BIG-IP Stack-Based Buffer Overflow Vulnerability KEV EPSS 2% 9.8, critical
  • CVE-2023-46747 F5 BIG-IP Configuration Utility Authentication Bypass Vulnerability KEV EPSS 97% 9.8, critical
  • CVE-2023-46748 F5 BIG-IP Configuration Utility SQL Injection Vulnerability KEV EPSS 4% 8.8, high
  • CVE-2022-1388 F5 BIG-IP Missing Authentication Vulnerability KEV EPSS 100% 9.8, critical
  • CVE-2021-22986 F5 BIG-IP and BIG-IQ Centralized Management iControl REST Remote Code Execution Vulnerability KEV EPSS 100% 9.8, critical
  • CVE-2021-22991 F5 BIG-IP Traffic Management Microkernel Buffer Overflow KEV EPSS 61% 9.8, critical
  • CVE-2020-5902 F5 BIG-IP Traffic Management User Interface (TMUI) Remote Code Execution Vulnerability KEV EPSS 100% 9.8, critical

Beyond this page

Is CVE-2026-97205 in your network?

This page tells you how dangerous CVE-2026-97205 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

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    Detect it if it's exploited

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Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 17 Oct 2026, not the live upstream state.