What is CVE-2026-111497?
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.
Timeline
- 2026-10-22Published to the U.S. National Vulnerability Database (NVD)
- 2026-10-24NVD record last updated
Affected product
See advisory
Remediation Steps
- Update Node.js to the patched version that addresses Brotli decoder vulnerability
- Test the patched version in a staging environment before production deployment
- Restrict untrusted sources of Brotli-compressed data
- Monitor for malicious Brotli payloads in application traffic
References
- https://nodejs.org/en/blog/vulnerability/october-2026-security-releases#nodejs-brotli-decoder-out-of-bounds-write-permits-remote-code-execution-cve-2026-111497---high
- http://www.openwall.com/lists/oss-security/2026/10/23/25
- https://github.com/advisories/GHSA-9v8h-qqgm-4m35
- https://nvd.nist.gov/vuln/detail/CVE-2026-111497
Referenced in our briefings & reports
- Vulnerability Priority Report – Week 3 of October 2026 (October 19 – 25)
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🤖 This CVE page is generated by defend.network from NVD, CISA KEV, EPSS, and our verified daily briefings. Severity and exploitation data come from official sources; always verify remediation steps against the official vendor advisory before acting in production.