CVE-2026-78951

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Published Aug 25, 2026 CVSS 3.1 · 9.6 Critical EPSS < 1% KEV · Not listed
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)

Analysis

AI-generated

Technical 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.

Remediation

No solution or workaround provided in the CVE record.

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

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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
Type Values Removed Values Added
CPEs cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*
Type Values Removed Values Added
Title Use after free in Chrome ServiceWorker Enables Remote Code Execution
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'}
Type Values Removed Values Added
Title Use after free in Chrome ServiceWorker Enables Remote Code Execution
Type Values Removed Values Added
First Time appeared Google
Google chrome
Vendors & Products Google
Google chrome
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
Earlier changes (1)
Weaknesses

Sources

Status
PUBLISHED
Assigner
Chrome
Published
Updated
Aug 27, 2026, 3:55 AM
Reserved
Aug 25, 2026, 6:04 AM

View source JSON

Updated
Aug 26, 2026, 12:15 AM

JSON

Status
Analyzed
Published
Aug 25, 2026, 9:17 PM
Modified
Aug 27, 2026, 4:17 AM

View source JSON

No data.

Updated
Aug 26, 2026, 3:00 AM

JSON