Google Chrome: Use after free in Core allows code execution outside sandbox
Summary
A use-after-free flaw in the Core component of Google Chrome before 156.0.8078.47 allows a remote attacker to execute arbitrary code outside the browser sandbox. The attack needs only a crafted HTML page, so a phishing link or a compromised website is enough, and the user must open the page. NVD rates the issue Critical (CVSS 9.6), while Google rates it Medium. Chromium-based browsers such as Microsoft Edge are affected as well.
Affected
- Google Chrome (desktop) before 156.0.8078.47 (per NVD)
- Chromium-based browsers that have not yet integrated the fix, e.g. Microsoft Edge before 156.0.4314.42 (per HKCERT)
Fixed in
- Google Chrome 156 (Stable, released 20 October 2026); minimum build 156.0.8078.47
- Install the newest Stable build, as later builds (e.g. 156.0.8078.73 on Linux) are reported to include this fix
- Microsoft Edge 156.0.4314.42 or later
- Ubuntu: the snap refresh of the Chromium package delivers the fix
Workaround
Unknown. No vendor workaround found; patching is the fix.
Exploitation
- CISA SSVC: exploitation none, automatable no, technical impact total
- Not confirmed as exploited in the wild
- Not listed in CISA KEV according to a third-party tracker; not checked directly
- No public proof of concept found
Our recommendation
- Treat as high priority: update all Chrome endpoints to the latest Stable version this week
- Verify the installed version on each device and make sure the browser has been restarted, because Chrome only applies updates after a restart
- Also update Microsoft Edge and any other Chromium-based or embedded browsers
- Keep automatic updates enabled and monitor vendor advisories
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 514016335 issues.chromium.org
- VulDB entry 424543 vuldb.com
- Vulners NVD record CVE-2026-113189 vulners.com
- HKCERT bulletin: Microsoft Edge multiple vulnerabilities www.hkcert.org
- Ubuntu security tracker CVE-2026-113189 ubuntu.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 30 Oct 2026, 22:31.
Original description (NVD)
Use after free in Core in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Medium)
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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