Web Origin Policy Bypass in Google Chrome by Google
CVE-2026-121251

8.8HIGH

Key Information:

Vendor

Google
Status
Chrome
Vendor
CVE Published:
3 November 2026

What is CVE-2026-121251?

A vulnerability exists in Google Chrome due to missing authorization in the V8 engine prior to version 157.0.8103.38. This flaw allows a remote attacker to craft a malicious HTML page that can bypass the web origin policy, potentially leading to unauthorized access or data exposure. Users are advised to update their browser promptly to mitigate any risks associated with this vulnerability.

Affected Version(s)

Chrome 157.0.8103.38

References

https://chromereleases.googleblog.com/2026/11/stable-chan...
https://issues.chromium.org/issues/561672123

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.