CVE-2026-78966

Received Received - Intake

Externally controlled reference in QUIC in Google Chrome

Publication date: 2026-08-25

Last updated on: 2026-08-25

Assigner: Chrome

Description

Externally controlled reference in QUIC in Google Chrome prior to 152.0.7977.65 allowed a remote attacker to bypass web origin policy via a crafted HTML page. (Chromium security severity: Medium)

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-08-25

Last Modified

2026-08-25

Generated

2026-08-26

AI Q&A

2026-08-26

EPSS Evaluated

N/A

NVD

CVE-2026-78966

Affected Vendors & Products

Vendor	Product	Version / Range
google	chrome	to 152.0.7977.65 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-610	The product uses an externally controlled name or reference that resolves to a resource that is outside of the intended control sphere.

Attack-Flow Graph

Executive Summary

This vulnerability involves an externally controlled reference in QUIC within Google Chrome before version 152.0.7977.65. A remote attacker could exploit a crafted HTML page to bypass the web origin policy, potentially allowing unauthorized access to resources or data from different origins.

Impact Analysis

If exploited, this vulnerability could allow attackers to access sensitive data or perform actions on behalf of users without their consent. This might lead to data theft, unauthorized transactions, or other malicious activities depending on the user's interactions with the affected browser.

Compliance Impact

This vulnerability could lead to unauthorized data access or exposure, which may violate GDPR's data protection principles or HIPAA's safeguards for protected health information. Organizations using vulnerable Chrome versions may face compliance risks and potential penalties.

Mitigation Strategies

Update Google Chrome to version 152.0.7977.65 or later to address the vulnerability.

Hi! I’m here to help you understand CVE-2026-78966. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70