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CriticalVulnerabilityCVE-2026-76027updated 30 Oct 2026, 01:17 UTC

Google Chrome: memory corruption flaw in CacheStorage can be triggered by a web page

A bug in Chrome's browser storage lets a malicious web page read parts of the computer's memory. Updating Chrome closes the hole.

Fix availableOfficial, 2 sources
SeverityCriticalCVSS 4.3 of 10
Being exploited?UnclearNo reports either way yet
Fix available?YesGoogle Chrome 156.0.8078.79 (Linux) and 156.0.8078.79/.80 (Windows and Mac) · since 29 Oct 2026
How sure is this?Official, 2 sourcesBacked by an official source

How the attack works simplified

  1. 1AttackerCreates a crafted web page
  2. 2Victim visits pageChrome loads the malicious HTML
  3. 3CacheStorage bugMemory corruption is triggered
  4. 4Memory readAttacker reads memory contents
  5. ResultAttacker reads browser memory data

What happened

Memory corruption in the CacheStorage component of Google Chrome before 156.0.8078.79 allows a remote attacker to read memory via a crafted HTML page.

Why it is dangerous: Anyone who visits a malicious or compromised website with an unpatched Chrome browser could have sensitive data read from memory, such as session information.

Are you affected?

You are affected if you run Google Chrome on Windows, Mac or Linux with a version earlier than 156.0.8078.79 (Windows and Mac: 156.0.8078.79/.80).

Google Chrome prior to 156.0.8078.79 (Stable/Extended Stable channel, Windows, Mac, Linux)

What to do

  1. Update Google Chrome to 156.0.8078.79 or 156.0.8078.80 (Windows and Mac) or 156.0.8078.79 (Linux)
  2. Restart Chrome after the update to make sure the fix is active
  3. Check Chrome's version under Settings > About Chrome

Timeline

  1. 29 Oct 2026, 21:26 UTC
    Publicly disclosed
  2. 29 Oct 2026, 21:26 UTC
    Reported by Google Chrome · Google Chrome
  3. 29 Oct 2026, 23:07 UTC
    Picked up by Zero Radar
  4. 30 Oct 2026, 01:17 UTC
    NVD reported on it · NVD

Sources 2 reports, oldest first

Official vendor, government CERT or advisory database

Technical details

ID
CVE-2026-76027
CVSS
4.3 / 10
Disclosed
29 Oct 2026, 21:26 UTC
On Zero Radar
29 Oct 2026, 23:07 UTC (2 h after disclosure)
Last change
30 Oct 2026, 01:17 UTC

The plain-language parts and the attack diagram were written by an AI model (anthropic/claude-haiku-5.5) from the sources above. Facts like versions, exploitation and dates come from the sources themselves. How Zero Radar works

Google Chrome: memory corruption flaw in CacheStorage can be triggered by a web page · Zero Radar