Google · Chromium V8
CVE-2026-87491
Google Chromium V8 Out of Bounds Write Vulnerability
概要
Out of bounds write in V8 in Google Chrome prior to 153.0.8010.36 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: Medium)
CISA: Google Chromium V8 contains an out of bounds write vulnerability that allows a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.
対処法
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.
米国連邦機関の対応期限：2026年9月23日
Googleのその他の悪用された脆弱性
| 追加日 | 脆弱性 | 製品 | 深刻度 | 攻撃の可能性 |
|---|---|---|---|---|
| 2026/09/04 | Type Confusion | Chromium V8 | 高 8.8 | 1.8% |
| 2026/06/09 | Out-of-Bounds Read and Write | Chromium V8 | 高 8.8 | 2.4% |
| 2026/03/13 | Improper Restriction of Operations Within the Bounds of a Memory Buffer | Chromium V8 | 高 8.8 | 2.7% |
| 2025/11/19 | Type Confusion | Chromium V8 | 高 8.8 | 4.9% |
| 2025/09/23 | Type Confusion | Chromium V8 | 高 8.8 | 9.0% |
| 2025/07/02 | Type Confusion | Chromium V8 | 高 8.1 | 14% |
| 2025/06/05 | Out-of-Bounds Read and Write | Chromium V8 | 高 8.8 | 7.6% |
| 2024/08/28 | Inappropriate Implementation | Chromium V8 | 高 8.8 | 19% |
出典：Known Exploited Vulnerabilities（CISA、パブリックドメイン）、CVE records（cve.org）、EPSS（FIRST）。攻撃の可能性は、今後30日以内に誰かがその脆弱性の悪用を試みるというEPSSの推定値です。