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High · 8.1 Public exploit CVE-2026-15176 EUVD-2026-101112GHSA-cvv4-j4mx-w8q5

NGINX ngx_http_core_module vulnerability

Published Oct 14, 2026 · Updated Oct 15, 2026 · Assigned by f5

Vendor: F5 Product: NGINX Open Source Product: NGINX Plus Package: nginx Package: nginx Package: nginx Package: nginx Package: nginx-mainline Package: nginx-stable Category: Network devices Ecosystem: Alpine Ecosystem: Azure Linux Ecosystem: Debian Ecosystem: Ubuntu Ecosystem: Wolfi

Description

A vulnerability exists in NGINX Plus and NGINX Open Source when a location is configured that uses the alias directive together with rewrite and a set or return directive referencing the $request_filename variable. Alternatively, the same result could be achieved when the $request_filename variable is used in an access log format directive. An unauthenticated attacker along with conditions beyond their control can exploit this vulnerability by sending crafted HTTP requests. This may cause a heap buffer overflow in the NGINX worker process leading to a restart. 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 or to possibly trigger a 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.

Affected products

VendorProductAffectedFixed
F5 NGINX Plus 37.1.0 – < 37.1.0.1, 37.0.0 – < 37.0.5.1, R36, R35, R34, R33 37.1.0.1
F5 NGINX Open Source 1.31.0 – < 1.31.7, 0.1.29 – < 1.30.6 1.31.7

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

Debian

Security tracker ↗
ReleasePackageFixed inAdvisory
Debian 14 nginx 1.30.4-8 —
Debian 13 nginx 1.26.3-3+deb13u10 —
Debian 12 nginx No fix yet —

Ubuntu

Security tracker ↗
ReleasePackageFixed inAdvisory
Ubuntu 26.10 nginx 1.30.4-7ubuntu1.1 USN-8955-1
Ubuntu 26.04 LTS nginx 1.28.3-2ubuntu1.12 USN-8955-1
Ubuntu 24.04 LTS nginx 1.24.0-2ubuntu7.19 USN-8955-1
Ubuntu 22.04 LTS nginx 1.18.0-6ubuntu14.22 USN-8955-1
Show 4 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu Pro 20.04 LTS nginx 1.18.0-0ubuntu1.7+esm4 USN-8955-2
Ubuntu Pro 18.04 LTS nginx 1.14.0-0ubuntu1.11+esm5 USN-8955-2
Ubuntu Pro 16.04 LTS nginx 1.10.3-0ubuntu0.16.04.5+esm10 USN-8955-2
Ubuntu Pro 14.04 LTS nginx 1.4.6-1ubuntu3.9+esm9 USN-8955-2

Red Hat

Security tracker ↗
ReleasePackageFixed inAdvisory
RHEL 10 nginx +9 2:1.26.3-16.el10_3.1 RHSA-2026:98634
RHEL 9 nginx +9 1:1.24.0-9.module+el9.9.0+25250+16ab46e3.1 RHSA-2026:98529, RHSA-2026:98528, RHSA-2026:98527
RHEL 8 nginx +8 1:1.24.0-3.module+el8.10.0+25265+69171071.6 RHSA-2026:98671
Show 3 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
RHEL 10.2 EUS nginx +9 2:1.26.3-6.el10_2.8 RHSA-2026:99156
RHEL 9.8 EUS nginx +9 1:1.24.0-7.module+el9.8.0+25264+0c16c726.6 RHSA-2026:99159, RHSA-2026:99158, RHSA-2026:99157
Red Hat Hardened Images 1 nginx +11 1.30.6-1.hum1 RHSA-2026:83427

AlmaLinux

Errata ↗
ReleasePackageFixed inAdvisory
AlmaLinux 8 nginx +8 1:1.24.0-3.module_el8.10.0+4360+5035a360.6.alma.2 ALSA-2026:98671

Rocky Linux

Errata ↗
ReleasePackageFixed inAdvisory
Rocky Linux 10 nginx +9 2:1.26.3-16.el10_3.1 RLSA-2026:98634
Rocky Linux 9 nginx +9 2:1.20.1-32.el9_9.1.rocky.0.1 RLSA-2026:98529, RLSA-2026:98527
Rocky Linux 8 nginx 1:1.24.0-3.module+el8.10.0+40144+38158758 RLSA-2026:98671

openSUSE

Security tracker ↗
ReleasePackageFixed inAdvisory
openSUSE Tumbleweed nginx 1.31.7-1.1 openSUSE-SU-2026:12143-1

Alpine

Security tracker ↗
ReleasePackageFixed inAdvisory
Alpine v3.24 nginx 1.30.6-r0 —

Amazon Linux

ReleasePackageFixed inAdvisory
Amazon Linux 2023 nginx +9 1:1.30.6-1.amzn2023.0.1 ALAS2023-2026-3263

Azure Linux

ReleasePackageFixed inAdvisory
Azure Linux 3 nginx 1.30.6-1 —

Oracle Linux

ReleasePackageFixed inAdvisory
Oracle Linux 8 nginx +8 1:1.24.0-3.0.1.module+el8.10.0+91116+653b4aa5.6 ELSA-2026-98671

Wolfi

ReleasePackageFixed inAdvisory
Wolfi rolling nginx-mainline 1.31.7-r0 —
Wolfi rolling nginx-stable 1.30.6-r0 —

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 1 repository

  • FranklinF25/cve-2026-15176 ★ 2 · Oct 27, 2026

    CVE-2026-15176 — NGINX alias+rewrite heap overflow: analysis, differential lab, PoC (WIP)

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Advisories 21

References