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4.3

CVE-2026-15131: Google Chrome Site Isolation Bypass via HTML Page

CVE-2026-15131 · published 3 months ago
Summary

A security issue in Google Chrome allows a hacker to access sensitive information from one website on another website's browser instance. This is a concern for users who visit multiple websites with sensitive information. To fix this issue, update Google Chrome to the latest version.

What to do
  • Update debian chromium to version 150.0.7871.114-1~deb13u1.
  • Update google chrome to version 150.0.7871.115 or later.
Affected software
Ecosystem VendorProductAffected versions
– google chrome < 150.0.7871.115
Debian:11 debian chromium All versions
Debian:12 debian chromium All versions
Debian:13 debian chromium < 150.0.7871.114-1~deb13u1
Fix: upgrade to 150.0.7871.114-1~deb13u1
Debian:14 debian chromium All versions
Original advisory text
Inappropriate implementation in Navigation in Google Chrome prior to 150.0.7871.115 allowed a remote attacker to bypass site isolation via a crafted HTML page. (Chromium security severity: Medium)
Inappropriate implementation in Navigation in Google Chrome prior to 150.0.7871.115 allowed a remote attacker to bypass site isolation via a crafted HTML page. (Chromium security severity: Medium)
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker partial control
Severity
4.3 Medium
Exploitation
<1% chance of attack within 30 days
Type
CWE-20Improper Input Validation
Timeline
Published8 Jul 2026
Updated4 Nov 2026
First seen8 Jul 2026
Sources
CVE-2026-15131 · MITRE
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