Name: CVE-2026-111497: Out-of-bounds Write
Creator: Rapid7
Published: 2026-10-22T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-111497, CWE-787, CWE-252, Exploited in the Wild, CISA KEV Exploit, Rapid7 Critical, CVSS 9.8, EPSS 0.87988, CISA KEV

Emergent ThreatCVE-2026-111497:Critical out-of-bounds write in the Node.js Brotli decoderBlog ↗

A buffer overflow vulnerability in the Brotli decoder (c/dec/decode.c) in Google Brotli versions 1.0.3 through 1.2.0 on all platforms allows a remote unauthenticated attacker to corrupt adjacent decoder state memory, disclose sensitive memory contents, cause a denial of service, or potentially execute arbitrary code using a crafted Brotli-compressed stream.

Users need to update any Brotli libraries or binaries between 1.0.3 through 1.2.0 to the latest available version: 1.0.10 or 1.1.1 or 1.2.1.

CVSS Details

CVSS 4.0 Base Score: 9.2 (CRITICAL)
CVSS 4.0 Vector: (CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X)
CVSS 3.1 Base Score: 9.8
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Alma_linux	—	Upgrade python3-brotliUpgrade brotliUpgrade dotnet-runtime-8.0Upgrade aspnetcore-targeting-pack-8.0Upgrade aspnetcore-runtime-dbg-8.0Upgrade aspnetcore-runtime-8.0Upgrade thunderbirdUpgrade nodejs-packaging-bundlerUpgrade dotnet-runtime-dbg-8.0Upgrade dotnet-hostfxr-8.0Upgrade dotnet-targeting-pack-8.0Upgrade nodejs-full-i18nUpgrade dotnet-sdk-8.0Upgrade nodejs-libsUpgrade npmUpgrade dotnet-apphost-pack-8.0Upgrade brotli-develUpgrade nodejsUpgrade firefoxUpgrade nodejs-nodemonUpgrade libbrotliUpgrade nodejs-docsUpgrade nodejs-develUpgrade dotnet-templates-8.0Upgrade nodejs-packagingUpgrade dotnet-sdk-dbg-8.0Upgrade dotnet-sdk-8.0-source-built-artifactsUpgrade v8-13.6-devel	Oct 27, 2026	Oct 26, 2026
Alpine Linux	—	Upgrade nodejs-currentUpgrade brotli	Oct 28, 2026	Oct 22, 2026
Amazon_linux_2023	—	Upgrade netstandard-targeting-pack-2.1Upgrade dotnet-sdk-dbg-8.0Upgrade nodejs24-docsUpgrade aspnetcore-runtime-dbg-8.0Upgrade python3-brotli-debuginfoUpgrade dotnet-hostfxr-8.0-debuginfoUpgrade nodejs24-npmUpgrade dotnet-host-debuginfoUpgrade dotnetUpgrade brotli-develUpgrade libbrotliUpgrade nodejs24-debuginfoUpgrade dotnet-hostfxr-8.0Upgrade python3-brotliUpgrade dotnet-runtime-8.0Upgrade nodejs24-libs-debuginfoUpgrade dotnet-targeting-pack-8.0Upgrade dotnet-apphost-pack-8.0-debuginfoUpgrade brotli-debuginfoUpgrade dotnet-templates-8.0Upgrade dotnet-runtime-8.0-debuginfoUpgrade nodejs24Upgrade dotnet-apphost-pack-8.0Upgrade dotnet-sdk-8.0-source-built-artifactsUpgrade dotnet-sdk-8.0-debuginfoUpgrade libbrotli-debuginfoUpgrade nodejs24-debugsourceUpgrade nodejs24-develUpgrade nodejs24-libsUpgrade aspnetcore-targeting-pack-8.0Upgrade aspnetcore-runtime-8.0Upgrade brotli-debugsourceUpgrade brotliUpgrade dotnet-hostUpgrade nodejs24-full-i18nUpgrade dotnet-runtime-dbg-8.0Upgrade dotnet8.0-debugsourceUpgrade v8-13.6-develUpgrade dotnet-sdk-8.0Upgrade dotnet8.0-debuginfo	Oct 28, 2026	Oct 22, 2026
Apple Osx Brotli	—	Upgrade macOS to the latest version	Nov 10, 2026	Nov 9, 2026
Debian	—	Upgrade brotli	Oct 28, 2026	Oct 22, 2026
Gentoo Linux	—	Upgrade app-arch/brotli.	Nov 11, 2026	Nov 10, 2026
Microsoft Dot_net	—	Upgrade .NET Runtime 10.0 to laterUpgrade .NET Runtime 8.0 to laterUpgrade .NET Runtime 9.0 to later	Nov 10, 2026	Oct 25, 2026
Microsoft Visual_studio	—	Update Microsoft Visual Studio 2022 to the latest version in the current channel channel.Update Microsoft Visual Studio 2026 to the latest version in the current channel channel.	Oct 26, 2026	Oct 25, 2026
Nodejs	—	Upgrade to the latest version of Node.jsUpgrade Node.js to version 26.12.1Upgrade Node.js to version 22.23.4Upgrade Node.js to version 24.22.1	Oct 26, 2026	Oct 22, 2026
Oracle_linux	—	Upgrade python3-brotliUpgrade dotnet-runtime-dbg-8.0Upgrade nodejs24-libsUpgrade dotnet-templates-8.0Upgrade aspnetcore-targeting-pack-8.0Upgrade nodejs-packagingUpgrade npmUpgrade nodejs-packaging-bundlerUpgrade aspnetcore-runtime-8.0Upgrade nodejs24-docsUpgrade nodejsUpgrade dotnet-targeting-pack-8.0Upgrade nodejs-full-i18nUpgrade nodejs24-full-i18nUpgrade dotnet-sdk-dbg-8.0Upgrade nodejs24-develUpgrade dotnet-runtime-8.0Upgrade dotnet-hostfxr-8.0Upgrade nodejs-npmUpgrade v8-12.4-develUpgrade nodejs24-npmUpgrade nodejs-docsUpgrade nodejs-libsUpgrade nodejs24Upgrade nodejs-nodemonUpgrade libbrotliUpgrade brotli-develUpgrade aspnetcore-runtime-dbg-8.0Upgrade v8-13.6-develUpgrade dotnet-apphost-pack-8.0Upgrade brotliUpgrade dotnet-sdk-8.0-source-built-artifactsUpgrade nodejs-develUpgrade dotnet-sdk-8.0	Oct 28, 2026	Oct 22, 2026
Palo Alto Networks Pan Os	—	Upgrade Palo Alto Networks PAN-OS to the latest version	Oct 27, 2026	Oct 26, 2026
Redhat Openshift	—	Upgrade ose-rhel-coreos	Nov 9, 2026	Oct 22, 2026
Redhat_linux	—	Upgrade dotnet8.0-debugsourceUpgrade dotnet-targeting-pack-8.0Upgrade dotnet-hostfxr-8.0-debuginfoUpgrade python3-brotliUpgrade dotnet-templates-8.0Upgrade nodejs-nodemonUpgrade nodejs-debuginfoUpgrade brotli-debuginfoUpgrade npmUpgrade python3-brotli-debuginfoUpgrade v8-13.6-develUpgrade dotnet-runtime-8.0Upgrade dotnet-runtime-8.0-debuginfoUpgrade dotnet-sdk-dbg-8.0Upgrade nodejs-packaging-bundlerUpgrade dotnet-sdk-8.0-debuginfoUpgrade libbrotliUpgrade nodejs-develUpgrade dotnet-runtime-dbg-8.0Upgrade dotnet8.0-debuginfoUpgrade nodejs-debugsourceUpgrade nodejs-packagingUpgrade dotnet-hostfxr-8.0Upgrade brotli-develUpgrade dotnet-sdk-8.0-source-built-artifactsUpgrade dotnet-sdk-8.0Upgrade aspnetcore-runtime-8.0Upgrade nodejsUpgrade nodejs-libs-debuginfoUpgrade nodejs-full-i18nUpgrade aspnetcore-runtime-dbg-8.0Upgrade nodejs-libsUpgrade brotli-debugsourceUpgrade aspnetcore-targeting-pack-8.0Upgrade libbrotli-debuginfoUpgrade nodejs-docsUpgrade v8-14.6-develUpgrade brotliUpgrade dotnet-apphost-pack-8.0Upgrade dotnet-apphost-pack-8.0-debuginfo	Oct 26, 2026	Oct 22, 2026
Ubuntu	—	Upgrade brotliUpgrade dotnet10Upgrade dotnet-runtime-8.0Upgrade dotnet-sdk-10.0Upgrade dotnet-hostfxr-10.0Upgrade dotnet-hostfxr-8.0Upgrade python3-brotliUpgrade aspnetcore-runtime-10.0Upgrade python3-brotli (Ubuntu Pro)Upgrade dotnet-host-8.0Upgrade dotnet-runtime-10.0Upgrade aspnetcore-runtime-8.0Upgrade dotnet-sdk-8.0Upgrade dotnet-sdk-aot-10.0Upgrade libbrotli1 (Ubuntu Pro)Upgrade python-brotli (Ubuntu Pro)Upgrade dotnet-sdk-dbg-10.0Upgrade brotli (Ubuntu Pro)Upgrade dotnet-host-10.0Upgrade libbrotli1Upgrade dotnet8	Oct 27, 2026	Oct 26, 2026
Vmware Photon_os	—	Use 'tdnf update' to upgrade all packages to the latest version.	Oct 28, 2026	Oct 22, 2026

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