---
id: CVE-2026-121257
title: >-
  Use after free in TabStrip in Google Chrome prior to 157.0.8103.38 allowed a
  remote attacker to potentially execute arbitrary code outside the sandbox via
  a crafted Chrome extension
summary: >-
  Use after free in TabStrip in Google Chrome prior to 157.0.8103.38 allowed a
  remote attacker to potentially execute arbitrary code outside the sandbox via
  a crafted Chrome extension. (Chromium security severity: Medium)
severity: critical
cvss: 9.6
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H'
cvssSource: adp
cwe:
  - CWE-416
vendor: Google
product: Chrome
affected:
  - Chrome >= 157.0.8103.38 < 157.0.8103.38
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-11-04T00:00:00+00:00'
published: '2026-11-03'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T04:56:09.016Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-121257'
references:
  - url: >-
      https://chromereleases.googleblog.com/2026/11/stable-channel-update-for-desktop.html
  - url: 'https://issues.chromium.org/issues/567672825'
tags:
  - cve.org
epss: 0.00211
epssPercentile: 0.11371
ingestedAt: '2026-11-05T21:36:00.748Z'
---

## Overview

Use after free in TabStrip in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to potentially execute arbitrary code outside the sandbox via a crafted Chrome extension. (Chromium security severity: Medium)

## Affected

- `Chrome >= 157.0.8103.38 < 157.0.8103.38`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.