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CVE-2026-9966: Integer overflow in Google Chrome

0
High
VulnerabilityCVE-2026-9966cvecve-2026-9966
Published: Thu May 28 2026 (05/28/2026, 22:25:39 UTC)
Source: CVE Database V5
Vendor/Project: Google
Product: Chrome

Description

CVE-2026-9966 is an integer overflow vulnerability in the XML processing component of Google Chrome on Windows versions prior to 148. 0. 7778. 216. This flaw could allow a remote attacker who has already compromised the renderer process to potentially escape the browser's sandbox by using a specially crafted HTML page. The vulnerability is classified with high severity by Chromium security. No CVSS score is provided, and no explicit patch status is confirmed in the available data. The vendor advisory link is provided but does not specify remediation details in the input data.

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 05/28/2026, 23:19:16 UTC

Technical Analysis

This vulnerability involves an integer overflow in XML handling within Google Chrome on Windows platforms before version 148.0.7778.216. Exploitation requires prior compromise of the renderer process and could lead to sandbox escape, increasing the attacker's privileges beyond the renderer sandbox. The vulnerability is acknowledged by Google with a high severity rating. No direct patch or remediation information is included in the provided data, though a vendor advisory URL is referenced.

Potential Impact

Successful exploitation could allow an attacker who has compromised the renderer process to escape the sandbox, potentially leading to elevated privileges and broader system compromise beyond the browser sandbox. This increases the risk associated with renderer process compromises by enabling further exploitation.

Mitigation Recommendations

Patch status is not yet confirmed — check the vendor advisory at https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html for current remediation guidance. Until official confirmation of a fix is obtained, users should update to version 148.0.7778.216 or later once available and exercise caution with untrusted HTML content.

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Technical Details

Data Version
5.2
Assigner Short Name
Chrome
Date Reserved
2026-05-28T17:25:03.564Z
Cvss Version
null
State
PUBLISHED
Remediation Level
null
Vendor Advisory Urls
[{"url":"https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html","vendor":"Google"}]

Threat ID: 6a18c676e29bf47b503b6336

Added to database: 5/28/2026, 10:49:26 PM

Last enriched: 5/28/2026, 11:19:16 PM

Last updated: 5/29/2026, 2:05:45 PM

Views: 9

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