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)
Published: 2026-08-25
Score: 9.6 Critical
EPSS: < 1% Very Low
KEV: No
Impact: Remote Code Execution
Action: Apply Patch
AI Analysis

Impact

A use‑after‑free flaw in Chrome’s ServiceWorker component lets a remote attacker run arbitrary code outside the normal sandbox boundaries by delivering a specially crafted HTML page. The vulnerability can be triggered from a web page and provides the attacker with the ability to execute code with the privileges of the browser process, which may lead to system compromise.

Affected Systems

The issue exists in Google Chrome for desktop versions earlier than 152.0.7977.65. Users running these versions are vulnerable.

Risk and Exploitability

The CVSS score is 9.6, but the Chromium team rated the severity as medium. Exploitation would require the victim to visit a malicious webpage, making this a client‑side attack. EPSS data is unavailable and the vulnerability is not listed in the CISA KEV catalog, indicating no confirmed widespread exploitation yet. The attack vector is inferred from the description and would be through a crafted HTML page served by an adversary.

Generated by OpenCVE AI on August 26, 2026 at 02:59 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Update Chrome to version 152.0.7977.65 or later through the normal update channel
  • Disable ServiceWorkers by launching Chrome with the --disable-service-works flag or adjusting chrome://flags settings until the patch is applied
  • Deploy an enterprise policy or extension that blocks ServiceWorker registration on untrusted sites

Generated by OpenCVE AI on August 26, 2026 at 02:59 UTC.

Tracking

Sign in to view the affected projects.

Advisories
Source ID Title
Debian DLA Debian DLA DLA-4771-1 chromium security update
Debian DSA Debian DSA DSA-6482-1 chromium security update
History

Wed, 26 Aug 2026 17:15:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*

Wed, 26 Aug 2026 03:15:00 +0000

Type Values Removed Values Added
Title Use after free in Chrome ServiceWorker Enables Remote Code Execution

Wed, 26 Aug 2026 01:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 9.6, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Tue, 25 Aug 2026 23:15:00 +0000

Type Values Removed Values Added
Title Use after free in Chrome ServiceWorker Enables Remote Code Execution

Tue, 25 Aug 2026 22:45:00 +0000

Type Values Removed Values Added
First Time appeared Google
Google chrome
Vendors & Products Google
Google chrome

Tue, 25 Aug 2026 20:30:00 +0000

Type Values Removed Values Added
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)
Weaknesses CWE-416
References

Subscriptions

Google Chrome
cve-icon MITRE

Status: PUBLISHED

Assigner: Chrome

Published:

Updated: 2026-08-27T03:55:34.260Z

Reserved: 2026-08-25T06:04:50.191Z

Link: CVE-2026-78951

cve-icon Vulnrichment

Updated: 2026-08-26T00:15:51.563Z

cve-icon NVD

Status : Analyzed

Published: 2026-08-25T21:17:51.080

Modified: 2026-08-27T04:17:06.893

Link: CVE-2026-78951

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-26T03:00:10Z

Weaknesses