Use After Free in Google Chrome ServiceWorker

Publication date: 2026-08-25

Last updated on: 2026-08-25

Assigner: Chrome

Description

Use after free in ServiceWorker in Google Chrome prior to 152.0.7977.65 allowed a remote attacker to execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Medium)

CVSS Scores

EPSS Scores

Probability:
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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-2026-78951

Affected Vendors & Products

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

Helpful Resources

Exploitability

CWE

KEV

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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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

Executive Summary

This is a use-after-free vulnerability in Google Chrome's ServiceWorker component. It occurs when a program continues to use memory after it has been freed, potentially allowing an attacker to execute arbitrary code outside the browser's sandbox. The vulnerability is triggered by a crafted HTML page and affects Chrome versions prior to 152.0.7977.65.

Impact Analysis

An attacker could exploit this to run malicious code on your system, bypassing Chrome's security sandbox. This could lead to unauthorized access to your data, installation of malware, or other malicious activities depending on the attacker's goals.

Mitigation Strategies

Update Google Chrome to version 152.0.7977.65 or later to address the use after free vulnerability in ServiceWorker.

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