CVE-2026-40460 vulnerabilities

🗓️ 17 Aug 2026 20:31:40Reported by ChainguardType

Heap overflow in nginx HTTP/2 chunked parsing causes memory corruption and DoS in nginx-mainline and nginx-stable.

Reporter	Title	Published	Views	Family All 90
FreeBSD	nginx-devel -- multiple vulnerabilities	13 May 202600:00	–	freebsd
FreeBSD	www/nginx -- Remote Code Execution/DoS	14 May 202600:00	–	freebsd
Tenable Nessus	Amazon Linux 2023 : nginx, nginx-all-modules, nginx-core (ALAS2023-2026-1714)	27 May 202600:00	–	nessus
Tenable Nessus	Amazon Linux 2 : nginx, --advisory ALAS2NGINX1-2026-012 (ALASNGINX1-2026-012)	27 May 202600:00	–	nessus
Tenable Nessus	Debian dsa-6278 : libnginx-mod-http-geoip - security update	16 May 202600:00	–	nessus
Tenable Nessus	Fedora 44 : nginx / nginx-mod-brotli / nginx-mod-fancyindex / etc (2026-094eb13bb1)	15 May 202600:00	–	nessus
Tenable Nessus	Fedora 42 : nginx / nginx-mod-brotli / nginx-mod-fancyindex / etc (2026-38623b4fed)	15 May 202600:00	–	nessus
Tenable Nessus	Fedora 43 : nginx / nginx-mod-brotli / nginx-mod-fancyindex / etc (2026-fb53cb4d67)	15 May 202600:00	–	nessus
Tenable Nessus	FreeBSD : nginx-devel -- multiple vulnerabilities (1ed77d8e-53bb-11f1-b339-3497f65b111b)	20 May 202600:00	–	nessus
Tenable Nessus	FreeBSD : www/nginx -- Remote Code Execution/DoS (3414ac89-4f9f-11f1-a1c0-0050569f0b83)	15 May 202600:00	–	nessus

OS	OS Version	Architecture	Package	Package Version	Filename
wolfi	any	x86_64	nginx-mainline	1.31.0-r0	nginx-mainline-1.31.0-r0.apk
wolfi	any	aarch64	nginx-mainline	1.31.0-r0	nginx-mainline-1.31.0-r0.apk
wolfi	any	x86_64	nginx-stable	1.30.1-r0	nginx-stable-1.30.1-r0.apk
wolfi	any	aarch64	nginx-stable	1.30.1-r0	nginx-stable-1.30.1-r0.apk

18 Aug 2026 08:24Current

6.2Medium risk

Vulners AI Score6.2

CVSS 3.16.5

CVSS 46.9

EPSS0.00373

SSVC