---
id: CVE-2026-79136
title: >-
  chromium-browser: Chromium: Web origin policy bypass via incorrect
  ServiceWorker authorization (CVE-2026-79136)
summary: >-
  A flaw was found in Chromium. This incorrect authorization vulnerability in
  the ServiceWorker component allows a remote attacker to bypass the web origin
  policy. By crafting a malicious HTML page, an attacker can circumvent security
  restri…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N'
cvssSource: vendor
cwe:
  - CWE-863
vendor: Red Hat
product: Chrome
affected:
  - Chrome >= 152.0.7977.65 < 152.0.7977.65
published: '2026-08-25'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T04:49:36+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-79136.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-79136.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-79136'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-79136'
  - url: >-
      https://chromereleases.googleblog.com/2026/08/stable-channel-update-for-desktop_0256176589.html
  - url: 'https://issues.chromium.org/issues/503624894'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00345
epssPercentile: 0.27916
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-08-27T19:39:09.227575Z'
scores:
  vendor: 5.4
  adp: 4.3
ingestedAt: '2026-09-17T23:31:20.811Z'
---

## Overview

A flaw was found in Chromium. This incorrect authorization vulnerability in the ServiceWorker component allows a remote attacker to bypass the web origin policy. By crafting a malicious HTML page, an attacker can circumvent security restrictions, potentially leading to unauthorized access to sensitive information or other security impacts.

## Vendor advisories

- **Red Hat VEX** · updated 2026-09-25 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-79136.json)

**chromium-browser: Chromium: Web origin policy bypass via incorrect ServiceWorker authorization**. Released 2026-08-25, updated 2026-09-25.

Not affected:

- All currently supported Red Hat products

## Remediation

Refer to the advisory for fix availability.