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Critical· 9.6official fix available

CVE-2026-87646

A critical flaw in Google Chrome’s Web Authentication lets attackers run code outside the browser sandbox by loading a specially crafted HTML page. The bug is a use‑after‑free error that can be triggered without any user interaction. Updating to Chrome 153.0.8010.36 or later fixes the issue.

publishedSep 9, 2026
last modifiedSep 10, 2026
sourcesNVD
severity · cvss
9.6
critical · how bad it is
exploitation · epss
<1%
29th percentile · chance of exploitation in 30 days
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →
auto-deletes from the system
counting…on Oct 9, 2026

An official fix is available, so this entry is kept for 30 days and then removed automatically.

01

Who is affected

Google Chrome browsers older than version 153.0.8010.36, used by general web users.

02

Real-world impact

An attacker could execute arbitrary code on the victim’s computer, potentially taking full control, stealing data, or installing malware.

03

Why this severity

The CVSS score of 9.6 reflects that the flaw is network‑exploitable, requires no privileges, and can lead to complete compromise of confidentiality, integrity, and availability.

04

What to do about it

official fix available
recommended steps
  1. 01Update Google Chrome to version 153.0.8010.36 or newer.
  2. 02Restart the browser to apply the update.

NVD description

05

Timeline

  1. Sep 9, 2026 · 5d ago
    Published
    Disclosed and added to the National Vulnerability Database.
  2. Sep 9, 2026 · 4d ago
    Official fix available
    A vendor patch or mitigation now exists — see the remediation steps above.
06

How it’s attacked

Attack vectorNetwork (remote)
Attack complexityLow
Privileges requiredNone
User interactionRequired
ScopeChanged
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
07

References & advisories

NVD advisory ↗Search advisories ↗
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →
CVE-2026-87646: A critical flaw in Google Chrome’s Web Authentication lets attackers r · Vulnary