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 0.82641, 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 brotliUpgrade python3-brotliUpgrade firefoxUpgrade thunderbirdUpgrade brotli-develUpgrade libbrotli	Oct 27, 2026	Oct 26, 2026
Alpine Linux	—	Upgrade brotliUpgrade nodejs-current	Oct 28, 2026	Oct 22, 2026
Amazon_linux_2023	—	Upgrade nodejs24-npmUpgrade nodejs24-debuginfoUpgrade python3-brotli-debuginfoUpgrade brotli-debuginfoUpgrade nodejs24-libs-debuginfoUpgrade libbrotliUpgrade brotli-develUpgrade nodejs24-docsUpgrade python3-brotliUpgrade brotli-debugsourceUpgrade nodejs24-full-i18nUpgrade libbrotli-debuginfoUpgrade nodejs24-libsUpgrade nodejs24-develUpgrade nodejs24-debugsourceUpgrade brotliUpgrade nodejs24Upgrade v8-13.6-devel	Oct 28, 2026	Oct 22, 2026
Debian	—	Upgrade brotli	Oct 28, 2026	Oct 22, 2026
Microsoft Visual_studio	—	Update Microsoft Visual Studio 2026 to the latest version in the current channel channel.Update Microsoft Visual Studio 2022 to the latest version in the current channel channel.	Oct 26, 2026	Oct 25, 2026
Nodejs	—	Upgrade Node.js to version 26.12.1Upgrade Node.js to version 24.22.1Upgrade to the latest version of Node.jsUpgrade Node.js to version 22.23.4	Oct 26, 2026	Oct 22, 2026
Oracle_linux	—	Upgrade nodejs-libsUpgrade brotli-develUpgrade v8-13.6-develUpgrade nodejs-develUpgrade nodejs-docsUpgrade nodejs24-npmUpgrade nodejs-npmUpgrade nodejs-nodemonUpgrade nodejs24Upgrade libbrotliUpgrade brotliUpgrade v8-12.4-develUpgrade nodejs-packagingUpgrade python3-brotliUpgrade nodejs-full-i18nUpgrade nodejsUpgrade nodejs24-docsUpgrade nodejs24-full-i18nUpgrade nodejs24-develUpgrade npmUpgrade nodejs24-libsUpgrade nodejs-packaging-bundler	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 libbrotliUpgrade python3-brotli-debuginfoUpgrade python3-brotliUpgrade brotli-debuginfoUpgrade libbrotli-debuginfoUpgrade brotli-debugsourceNo solution existsUpgrade brotli-develUpgrade brotli	Oct 26, 2026	Oct 22, 2026
Ubuntu	—	Upgrade python3-brotliUpgrade brotliUpgrade python-brotli (Ubuntu Pro)Upgrade python3-brotli (Ubuntu Pro)Upgrade libbrotli1Upgrade libbrotli1 (Ubuntu Pro)Upgrade brotli (Ubuntu Pro)	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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CVSS Details

Covered by Rapid7

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