CVE-2026-111497: Critical out-of-bounds write in the Node.js Brotli decoder
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Overview On October 21, 2026, the Node.js Project published a security advisory for CVE-2026-111497 , an out-of-bounds write in the Brotli decoder bundled with Node.js. The vulnerability affects the Node.js 26.x , 24.x , and 22.x release lines. Node.js rates the issue High, while Google, the CVE Numbering Authority (CNA), gives it a critical CVSSv4 score of 9.2 .
Summary from Rapid7 Blog.
Explained
The technology and terms in this story. Learn more
- WeaknessMemory corruptionBugs that let a program write where it shouldn't in memory, often leading to code execution.
- AttackRemote code execution · RCEA flaw that lets an attacker run their own code on someone else's machine over the network.
- ConceptKEV · Known Exploited Vulnerabilities catalogCISA's list of vulnerabilities with evidence of real-world exploitation.
- ConceptCVE · Common Vulnerabilities and ExposuresThe public ID system for vulnerabilities, such as CVE-2026-12345, so everyone means the same bug.
Why it was possible
The weaknesses behind this story's CVEs, from each CVE Record.
Vulnerabilities in this story
Severity and exploitation facts from NVD, FIRST, and CISA.
Related coverage
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