CVE-2026-111497: Brotli 1.0.3 to before 1.0.10, 1.1.0 to before 1.1.1, 1.2.0 to before 1.2.1

Affected technology

Brotli · 1.0.3 to before 1.0.10, 1.1.0 to before 1.1.1, 1.2.0 to before 1.2.1
Google

Description’s affected range: versions 1.0.3 through 1.2.0 on all platforms

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 4.0): Network (remote) · No privileges required · No user interaction required

What an attacker can do

A remote unauthenticated attacker can 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. Vendor/CNA’s CVSS 4.0 assessment (base score 9.2/10) rates confidentiality, integrity and availability impact as high.