CVE-2026-0902: 
vulnerability analysis and mitigation

CVE-2026-0902 is an inappropriate implementation vulnerability in the V8 JavaScript engine affecting Google Chrome prior to version 144.0.7559.59 and Microsoft Edge (Chromium-based). The flaw allows a remote attacker to perform an out-of-bounds memory read via a crafted HTML page. It was reported by researcher '303f06e3' on 2025-12-16 and publicly disclosed on January 13, 2026, when Google released Chrome 144. The vulnerability carries a CVSS v3.1 base score of 8.8 (High), as assessed by CISA-ADP (Chrome Release Notes, Microsoft MSRC).

The root cause is classified as CWE-474 (Use of Function with Inconsistent Implementations) within Chrome's V8 JavaScript engine, where an inappropriate implementation leads to an out-of-bounds memory read condition. An attacker can exploit this by luring a victim to visit a specially crafted HTML page, triggering the V8 engine to read memory outside intended boundaries. Exploitation requires user interaction (visiting a malicious page) but no authentication or elevated privileges. The Chromium issue tracker entry (ID 469143679) is currently restricted pending broader user updates (Chrome Release Notes).

Successful exploitation can result in high confidentiality, integrity, and availability impact on the affected system, as reflected in the CVSS score. An attacker who tricks a user into visiting a malicious web page could read sensitive memory contents, potentially leading to information disclosure, further exploitation primitives, or full browser compromise. Given that Chrome and Edge are ubiquitous across enterprise and consumer environments, the attack surface is extremely broad (Chrome Release Notes, Microsoft MSRC).

1. Reconnaissance: Identify targets running Google Chrome versions prior to 144.0.7559.59 (Windows/Linux) or 144.0.7559.60 (macOS), or unpatched Microsoft Edge (Chromium-based) installations.
2. Craft malicious HTML page: Develop a specially crafted HTML page containing JavaScript that triggers the inappropriate V8 implementation, causing an out-of-bounds memory read when parsed by the V8 engine.
3. Deliver payload: Host the malicious page on an attacker-controlled server and deliver the URL to the target via phishing email, malicious advertisement, or compromised website (drive-by download scenario).
4. Trigger exploitation: When the victim visits the page using a vulnerable browser, the V8 engine processes the crafted JavaScript, triggering the out-of-bounds memory read.
5. Leverage memory disclosure: Use the leaked memory contents to defeat ASLR or other mitigations, potentially chaining with additional vulnerabilities to achieve code execution or further system compromise (Chrome Release Notes).

• Network: Unexpected outbound connections from browser processes to unknown or suspicious external IP addresses; HTTP/HTTPS requests to newly registered or low-reputation domains delivering JavaScript-heavy content.
• Process: Unusual child processes spawned by chrome.exe or msedge.exe (e.g., cmd.exe, powershell.exe, curl); renderer process crashes or abnormal memory usage spikes in browser processes.
• Logs: Browser crash reports or renderer process termination events logged around the time of visiting an unknown URL; Windows Event Logs showing unexpected process creation from browser parent processes.
• File System: Unexpected files written to the user's temp directory or AppData by browser renderer processes; new or modified browser extensions installed without user action.

Google has released Chrome 144.0.7559.59 (Linux) and 144.0.7559.59/60 (Windows/Mac) which address this vulnerability. Microsoft has also released a patched version of Edge (Chromium-based) through the Microsoft Security Response Center. Organizations should immediately update all Chrome and Edge installations to the patched versions, enforce automatic browser updates via policy, and consider web content filtering to reduce exposure to malicious pages (Chrome Release Notes, Microsoft MSRC).

The Chrome 144 release received coverage from multiple security outlets including SecurityOnline, CyberSecurityNews, GBHackers, and Forbes, noting the 10 security fixes included in the update. CIS published an advisory noting that multiple vulnerabilities in Chrome 144 could allow arbitrary code execution. Palo Alto Networks also issued an advisory (PAN-SA-2026-0002) as part of their Chromium monthly vulnerability update for February 2026. Community reaction was generally focused on the broader Chrome 144 release rather than this specific CVE, given its Medium severity rating relative to the High-severity V8 issues in the same update (CIS Advisory, Palo Alto Advisory).