[悪用確認] CVE-2026-111497: Google Brotli Unchecked Return Value Vulnerability

Google Brotli Google Brotli contains an unchecked return value vulnerability that 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. 対応: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines. (期限 2026-11-10)

Read on CISA Known Exploited Vulnerabilities

On 10/28/2026, 04:58 AM, CISA Known Exploited Vulnerabilities published "[悪用確認] CVE-2026-111497: Google Brotli Unchecked Return Value Vulnerability" (type: Advisory). Severity is "Critical" (critical). CVE: CVE-2026-111497.