CVE-2026-2649 in Chrome
Summary
by MITRE • 02/19/2026
Integer overflow in V8 in Google Chrome prior to 145.0.7632.109 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: High)
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Analysis
by VulDB Data Team • 02/23/2026
This vulnerability represents a critical integer overflow condition within the V8 JavaScript engine used by Google Chrome and Chromium-based browsers. The flaw occurs when processing certain HTML elements that trigger integer arithmetic operations beyond the maximum representable value for the data type. Such overflow conditions can lead to unexpected behavior in memory allocation and handling, creating opportunities for heap corruption. The vulnerability is particularly concerning because it can be triggered through web content without requiring user interaction beyond visiting a malicious webpage, making it a prime target for remote code execution attacks.
The technical implementation of this vulnerability stems from improper bounds checking within V8's memory management routines. When the JavaScript engine processes crafted HTML elements, it performs arithmetic operations on integer values that should be constrained within specific ranges. However, due to insufficient validation, these operations can overflow and produce negative or excessively large values that corrupt heap metadata or overwrite adjacent memory regions. This type of flaw falls under CWE-190, which specifically addresses integer overflow conditions, and represents a common vector for heap-based memory corruption attacks. The Chromium security team classified this as High severity due to the potential for arbitrary code execution when exploited.
The operational impact of CVE-2026-2649 extends beyond simple browser exploitation, as it provides attackers with a pathway to bypass modern security mitigations such as address space layout randomization and data execution prevention. An attacker could craft a malicious webpage that, when loaded in a vulnerable browser, triggers the integer overflow condition and subsequently executes malicious code with the privileges of the browser process. This vulnerability aligns with ATT&CK technique T1059.007 for JavaScript execution and T1203 for exploitation for execution, making it particularly dangerous in targeted attack scenarios where adversaries seek to establish persistent access through web-based delivery mechanisms.
Mitigation strategies for this vulnerability require immediate patching of affected browser versions, as the integer overflow condition cannot be effectively addressed through configuration changes or network-level controls. Organizations should prioritize updating Chrome to version 145.0.7632.109 or later, which includes the necessary fixes to prevent the overflow condition in V8's memory handling routines. Additional defensive measures include implementing strict content security policies, disabling unnecessary browser features, and deploying web application firewalls that can detect and block malicious HTML content. Security teams should also monitor for indicators of compromise related to this vulnerability, including unusual memory allocation patterns or heap corruption signatures that may appear during exploitation attempts.