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 0.55483, 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 libbrotliUpgrade python3-brotliUpgrade brotli-develUpgrade brotli	Oct 27, 2026	Oct 26, 2026
Alpine Linux	—	Upgrade brotliUpgrade nodejs-current	Oct 28, 2026	Oct 22, 2026
Amazon_linux_2023	—	Upgrade brotli-debugsourceUpgrade nodejs24-full-i18nUpgrade v8-13.6-develUpgrade nodejs24-develUpgrade libbrotli-debuginfoUpgrade nodejs24-libsUpgrade nodejs24Upgrade nodejs24-debugsourceUpgrade brotliUpgrade libbrotliUpgrade brotli-debuginfoUpgrade nodejs24-libs-debuginfoUpgrade python3-brotliUpgrade nodejs24-docsUpgrade nodejs24-npmUpgrade nodejs24-debuginfoUpgrade python3-brotli-debuginfoUpgrade brotli-devel	Oct 28, 2026	Oct 22, 2026
Debian	—	Upgrade brotli	Oct 28, 2026	Oct 22, 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 22.23.4Upgrade Node.js to version 26.12.1Upgrade Node.js to version 24.22.1	Oct 26, 2026	Oct 22, 2026
Oracle_linux	—	Upgrade npmUpgrade nodejs-packagingUpgrade nodejs-packaging-bundlerUpgrade nodejs24-develUpgrade nodejs24-full-i18nUpgrade nodejs-libsUpgrade brotli-develUpgrade nodejs-develUpgrade nodejs-npmUpgrade libbrotliUpgrade nodejs24-npmUpgrade nodejs-docsUpgrade nodejs24-docsUpgrade python3-brotliUpgrade nodejs-full-i18nUpgrade nodejsUpgrade nodejs24-libs	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_linux	—	Upgrade python3-brotliUpgrade brotli-debuginfoUpgrade libbrotliUpgrade python3-brotli-debuginfoUpgrade brotli-debugsourceUpgrade libbrotli-debuginfoNo solution existsUpgrade brotliUpgrade brotli-devel	Oct 26, 2026	Oct 22, 2026
Ubuntu	—	Upgrade brotliUpgrade python3-brotliUpgrade libbrotli1	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

Prioritize with Active Threat Intelligence

With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.

Explore Intelligence Hub

MDR Buyer's Guide

Global Threat Landscape Report

Grow your business