CVE-2026-103630
Received Received - Intake

Use After Free in Google Chrome via FedCM

Publication date: 2026-10-02

Last updated on: 2026-10-02

Assigner: Chrome

Description
Use after free in FedCM in Google Chrome prior to 154.0.8037.97 allowed a remote attacker to execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: High)

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Meta Information

Published
2026-10-02
Last Modified
2026-10-02
Generated
2026-10-02
AI Q&A
2026-10-02
EPSS Evaluated
N/A
NVD
CVE-2026-103630
EUVD
EUVD-2026-91709

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
google chrome to 154.0.8037.97 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-416 The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Attack-Flow Graph

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Executive Summary

This is a use-after-free vulnerability in FedCM (Federated Credential Management) in Google Chrome versions prior to 154.0.8037.97. A use-after-free occurs when a program continues to use memory after it has been freed, potentially leading to arbitrary code execution. In this case, a remote attacker could exploit this by crafting a malicious HTML page to execute arbitrary code outside the browser's sandbox.

Impact Analysis

If exploited, this vulnerability could allow an attacker to run malicious code on your device through a specially crafted webpage. This could lead to unauthorized access to your data, installation of malware, or further compromise of your system. The sandbox escape means the attack could affect your entire system, not just the browser.

Mitigation Strategies

Update Google Chrome to version 154.0.8037.97 or later to address the use-after-free vulnerability in FedCM.

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