CVE-2026-87491

HIGH

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)

CVSS v3.1 Score

8.8
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Published: 9/9/2026Modified: 9/10/2026

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Attackers are weaponizing the gap between Chromium fixes and Chrome patches

A new exploit kit is revealing the perils of the “patch later” mentality. According to the Proofpoint Threat Research team , espionage-motivated threat actors are using a new malicious toolkit to chain together four separate Chrome browser and Microsoft Windows vulnerabilities to allow them to launch targeted spear phishing campaigns. Proofpoint, which researched the new attack method along with G

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Chrome V8 Zero-Day Exploited in the Wild Enables Code Execution Inside Sandbox

Google on Thursday released updates to patch 230 security vulnerabilities, including one that has come under active exploitation in the wild. The medium-severity vulnerability, assigned the CVE identifier CVE-2026-87491 (CVSS score: N/A), has been described as an out-of-bounds bug in V8, Chrome's JavaScript and WebAssembly engine. "Out-of-bounds write in V8 in Google Chrome prior to

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References (3)

https://chromereleases.googleblog.com/2026/09/stable-channel-update-for-desktop_0808145027.htmlRelease NotesVendor Advisoryhttps://issues.chromium.org/issues/543557673Permissions Requiredhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-87491US Government Resource