CVE-2026-113040: Improper input validation in Google Chrome
Description
CVE-2026-113040 is a high-severity vulnerability in Google Chrome prior to version 156.0.8078.47 involving improper input validation in the Proxy component. This flaw could allow a remote attacker to execute arbitrary code within the browser's sandbox by delivering a crafted HTML page. The vulnerability has a CVSS score of 8.8, indicating a critical impact on confidentiality, integrity, and availability. The issue was publicly disclosed on October 20, 2026, and an official fix is available in Chrome version 156.0.8078.47.
CVSS v3.1
Score 8.8high
Affected software
Chrome
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability arises from improper input validation in the Proxy component of Google Chrome versions before 156.0.8078.47. Exploiting this flaw, a remote attacker can potentially execute arbitrary code inside the sandbox environment by crafting a malicious HTML page. The vulnerability has been assigned CVE-2026-113040 and carries a high severity rating with a CVSS v3.1 score of 8.8. The vendor has released an official fix in Chrome 156.0.8078.47, as documented in the Google Chrome stable channel update advisory.
Potential Impact
Successful exploitation allows remote code execution within the sandboxed environment of Google Chrome, potentially compromising confidentiality, integrity, and availability of the affected system. The high CVSS score reflects the significant risk posed by this vulnerability if left unpatched.
Mitigation Recommendations
An official fix is available in Google Chrome version 156.0.8078.47. Users and administrators should update to this version or later to remediate the vulnerability. No additional mitigation steps are indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Chrome
- Date Reserved
- 2026-10-19T22:53:06.984Z
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://chromereleases.googleblog.com/2026/10/stable-channel-update-for-desktop_02018666648.html","vendor":"Google"}]
Threat ID: 6ad7df782cdf04f656642706
Added to database: 10/20/2026, 21:39:04 UTC
Last enriched: 10/21/2026, 02:04:04 UTC
Last updated: 10/21/2026, 02:04:04 UTC
Views: 3
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