brotli vulnerabilities and fixes

Recent CVEs affecting brotli, with upgrade or downgrade steps. 1 tracked.

brotli has 1 tracked vulnerability, 1 critical and 1 exploited in the wild (CISA KEV). A fixed release or vendor patch exists for 1. Most recent: 2026-10-22. Highest priority: CVE-2026-111497 (score 90/100).

• CVE-2026-111497 CRITICAL 9.2 EXPLOITED MITIGATE Google Brotli Unchecked Return Value Vulnerability

FAQ

How do I fix brotli vulnerabilities?

Open the CVE for your version, check the affected range, then follow the listed action: upgrade to the fixed release, or downgrade or mitigate if no fix exists yet. Commands for each OS are shown on every CVE page.

Is brotli being exploited right now?

Yes: 1 brotli CVE is on the CISA Known Exploited Vulnerabilities list, so patch it first.

Which brotli CVE should I patch first?

CVE-2026-111497 currently ranks highest (90/100): Google Brotli Unchecked Return Value Vulnerability.

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