Google Chrome: Use-after-free in Workers allows code execution in sandbox
Summary
A use-after-free vulnerability in the Workers component of Google Chrome allows a remote attacker to execute arbitrary code inside the browser sandbox. The attack requires the victim to open a crafted HTML page, for example via a link, advertisement or compromised website. NVD rates the issue as CVSS 3.1 8.8 (High), while Chromium rates it as Medium. Full system compromise would likely require an additional sandbox escape, which is not confirmed by the vendor.
Affected
- Google Chrome prior to 156.0.8078.47 (NVD/CNA description)
- Android Chrome builds before 156.0.8078.47 (secondary reporting)
- Chromium-based browsers that have not yet integrated the fix (e.g. Microsoft Edge prior to 156.0.4314.42 according to HKCERT)
Fixed in
- Google Chrome 156.0.8078.47 or later (Linux, Android)
- Chrome 156.0.8078.47/.48 or later (Windows, macOS, according to secondary reports; vendor page not retrieved)
- Newest Stable build recommended, as later fixes exist
Workaround
No workaround identified. Updating Chrome is the only documented remedy.
Exploitation
No known exploitation found. No public proof-of-concept found. Not listed in CISA KEV according to one tracker. CISA SSVC assessment: exploitation none, automatable no, technical impact total.
Our recommendation
- Inventory all Chrome, Edge and other Chromium browsers, including Linux snaps and Android devices.
- Update to the newest Stable build without delay, at least 156.0.8078.47 (Linux, Android) or 156.0.8078.47/.48 (Windows, macOS).
- Restart the browser after the update to load the fixed version.
- Use browser policies to enforce minimum versions and monitor for unpatched devices.
- Prioritise patching based on the NVD score of 8.8, because email and web browsing are the main risk.
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
- Vulners CVE record vulners.com
- VulDB entry vuldb.com
- Ubuntu security notice ubuntu.com
- HKCERT security bulletin (Microsoft Edge) www.hkcert.org
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, 15:07.
Original description (NVD)
Use after free in Workers 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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