CVE-2026-97205: NGINX ngx_http_core_module vulnerability

High · CVSS 8.1 (CVSS 3.1)EPSS n/aPublished 2026-10-14 14:40 UTCUpdated 2026-10-15 11:18 UTCAssigner: f5

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.

Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H · CWE-416

Status incidents that name it

Akamai Customer Security Advisory: Critical F5/NGINX Out-of-Band Vulnerabilities
2026-10-22 20:17 UTC · No impact listed · says not affected (notice says “not vulnerable”)
“…continues to investigate the potential impact of the recently published F5/NGINX vulnerabilities (CVE-2026-15176, CVE-2026-97205, and CVE-2026-93479) across our platform and infrastructure. Customers and partners with a valid Control Center login…”
Linode (Akamai) Customer Security Advisory: Critical F5/NGINX Out-of-Band Vulnerabilities
2026-10-22 20:08 UTC · No impact listed · names this CVE
“…Out-of-Band Vulnerabilities Akamai is aware of the recently published F5/NGINX vulnerabilities (CVE-2026-15176, CVE-2026-97205, and CVE-2026-93479), and our teams are actively investigating their potential impact across our platform and…”

Affected vendors and products

F5: NGINX Open SourceF5: NGINX Plus

References

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