CVE-2026-121108
Awaiting Analysis Awaiting Analysis - Queue

BackgroundFetch Confused Deputy Vulnerability in Google Chrome

Publication date: 2026-11-03

Last updated on: 2026-11-03

Assigner: Chrome

Description
Confused deputy in BackgroundFetch in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to potentially bypass web origin policy via a crafted HTML page. (Chromium security severity: Medium)

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-11-03
Last Modified
2026-11-03
Generated
2026-11-04
AI Q&A
2026-11-04
EPSS Evaluated
N/A
NVD
CVE-2026-121108
EUVD
EUVD-2026-116450

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
Google Chrome 157.0.8103.38

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-441 The product receives a request, message, or directive from an upstream component, but the product does not sufficiently preserve the original source of the request before forwarding the request to an external actor that is outside of the product's control sphere. This causes the product to appear to be the source of the request, leading it to act as a proxy or other intermediary between the upstream component and the external actor.

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

This vulnerability is a confused deputy issue in Google Chrome's BackgroundFetch feature. It allows a remote attacker to bypass web origin policy by tricking the browser into performing actions on behalf of the attacker using a specially crafted HTML page.

Impact Analysis

An attacker could exploit this to perform unauthorized actions on websites you visit, potentially accessing sensitive data or performing actions without your knowledge. This could lead to data theft or account compromise if you interact with the malicious page.

Mitigation Strategies

Update Google Chrome to version 157.0.8103.38 or later to address the vulnerability.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-121108. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart

Security Radar

News mentioning this vulnerability
Loading related security news...