Google Chrome: Memory corruption in Autofill allows code execution in sandbox
Summary
Memory corruption in the Autofill feature of Google Chrome before 156.0.8078.79 can be abused by a remote attacker to execute arbitrary code inside the browser sandbox. The attack requires that a user visits a crafted HTML page, for example through a phishing link or a compromised website. Chromium rates the flaw as High severity, and CVSS 3.1 is 8.8.
Affected
- Google Chrome desktop builds before 156.0.8078.79 on Windows, Mac and Linux
- Android and iOS: Unknown.
Fixed in
- Google Chrome 156.0.8078.79 or later (Windows, Mac and Linux, per the vendor's Stable Channel Update of 29 October 2026)
Workaround
Unknown. The vendor documents no workaround; the update is the fix.
Exploitation
- No evidence of exploitation in the wild known at the time of research.
- Not listed in CISA KEV according to an aggregator (not verified directly with CISA).
- No public proof-of-concept found.
Our recommendation
- Check the Chrome version on all managed endpoints and confirm it is 156.0.8078.79 or later.
- Restart Chrome after the update, because the update is applied on relaunch.
- Confirm that other Chromium-based browsers in use (e.g. Edge, Brave) have shipped their own fixes.
- Monitor for updates and for reports of exploitation.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Chrome Releases: Stable Channel Update for Desktop chromereleases.googleblog.com
- Chromium issue tracker issues.chromium.org
- VulDB CVE-2026-76026 vuldb.com
- Security Online: Chrome 156 security update securityonline.info
- The Hacker Wire: CVE-2026-76026 www.thehackerwire.com
- Strix: CVE-2026-76026 www.strix.ai
- ThreatInt: CVE-2026-76026 cve.threatint.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 31 Oct 2026, 08:47.
Original description (NVD)
Memory corruption in Autofill in Google Chrome prior to 156.0.8078.79 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: High)
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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