Google Chrome: Use-after-free in Actor allows code execution inside the sandbox
Summary
Google Chrome before 156.0.8078.47 contains a use-after-free vulnerability in the Actor component. A remote attacker can execute arbitrary code inside the browser sandbox by luring a user to a crafted HTML page. Exploitation requires that the user opens the page, for example through a malicious link or a compromised website. Full compromise would normally require a second flaw to escape the sandbox.
Affected
- Google Chrome prior to 156.0.8078.47
- Microsoft Edge (Chromium-based) prior to 156.0.4314.42, according to HKCERT (secondary source)
- Chromium-based Linux installs: Ubuntu marks its chromium-browser package as not affected, because it installs the Chromium snap, which must be updated
Fixed in
- Google Chrome 156.0.8078.47 (Linux and Android, according to secondary reports)
- Google Chrome 156.0.8078.47 or 156.0.8078.48 (Windows and macOS, according to secondary reports)
- Microsoft Edge 156.0.4314.42 or later (according to HKCERT)
- Vendor advisory was not directly verified
Workaround
No workaround is documented in the sources. Update Chrome and fully relaunch the browser, because a running process may still be the old version.
Exploitation
- No evidence of in-the-wild exploitation was found in the sources.
- No public proof of concept was found.
- VulDB rates exploitation as easy, based on automated estimates, not on observed attacks.
Our recommendation
- Confirm that all workstations run Google Chrome 156.0.8078.47 or later, and Microsoft Edge 156.0.4314.42 or later if used.
- Force a full browser restart on endpoints where Chrome has not been relaunched after the update.
- Check managed or pinned Chrome fleets and Chromium snap versions on Linux systems.
- Treat as a priority update within the normal patch cycle, not an emergency, as no exploitation is known.
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 entry (not accessible for verification) issues.chromium.org
- NVD mirror on Vulners: CVE-2026-113087 vulners.com
- VulDB entry 424244 vuldb.com
- Ubuntu security notice CVE-2026-113087 ubuntu.com
- HKCERT security bulletin on Microsoft Edge vulnerabilities www.hkcert.org
- Cybersecurity News: Chrome security update fixing 353 flaws cybersecuritynews.com
- Windows Forum: Chrome 156 security update windowsforum.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, 14:13.
Original description (NVD)
Use after free in Actor in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to execute arbitrary code inside 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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