Google Chrome: Use-after-free in Prompts component allows sandbox code execution
Summary
Google Chrome before 156.0.8078.47 contains a use-after-free vulnerability in the Prompts component. A remote attacker can execute arbitrary code inside the browser sandbox by luring a user to a crafted HTML page. The victim must visit the page, and no authentication is needed on the attacker side. Chromium rates the severity as Low, and the sources do not describe a full sandbox escape.
Affected
- Google Chrome desktop prior to 156.0.8078.47
- Linux, Windows and macOS builds as listed in the vendor release
- Debian and Ubuntu Chromium packages are separate from Google Chrome; Ubuntu lists its Chromium package as not affected
Fixed in
- 156.0.8078.47 (minimum fixed version per CNA description and vendor release)
- Windows and macOS: sources list 156.0.8078.47 or 156.0.8078.48; verify each installation
- Newer Stable builds are listed by a third-party source; deploy the latest Stable build
Workaround
Unknown. No workaround is documented; applying the update is the mitigation.
Exploitation
- CISA SSVC assessment in the official CVE record: Exploitation none, Automatable no, Technical Impact total
- No public proof of concept found
- No evidence of exploitation in the wild found; CISA KEV status not verified directly
Our recommendation
- Confirm that all Chrome installations run 156.0.8078.47 or later, preferably the latest Stable build.
- Check the version via Menu > Help > About Google Chrome; the update takes effect after relaunch.
- Enforce updates on managed devices through your management tooling.
- Update Chromium packages on Debian or Ubuntu systems separately, since they are not Google Chrome.
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 issues.chromium.org
- NVD mirror on Vulners vulners.com
- Debian CVE list entry on Vulners vulners.com
- Ubuntu security CVE page ubuntu.com
- HKCERT security bulletin www.hkcert.org
- TechSpot Google Chrome download listing www.techspot.com
- BrowserHow Chrome 156 stable update browserhow.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, 12:17.
Original description (NVD)
Use after free in Prompts 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: Low)
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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