Google Chrome: Use-after-free in API allows code execution in sandbox
Summary
A use-after-free vulnerability in the API component of Google Chrome allows a remote attacker to execute arbitrary code inside the browser sandbox. The attacker needs the victim to visit a crafted HTML page, so phishing or a compromised website is the realistic attack path. Chromium rates the issue Medium, and the CVSS base score is 8.8. Full system compromise would normally require a second sandbox-escape vulnerability, which is not described in the sources.
Affected
- Google Chrome before 156.0.8078.47 (per NVD/CNA data)
- Exact affected range is unclear: one aggregator lists up to 155.0.8059.84, and the CNA entry is internally inconsistent. Unknown.
Fixed in
- Google Chrome 156.0.8078.47 or later (per NVD/CNA data)
- Latest Chrome 156 build recommended. Exact fixed build per platform: Unknown.
- Chromium-based browsers (e.g. Edge) need their own vendor updates. Fixed versions for these: Unknown.
Workaround
Unknown. No vendor workaround is documented. Apply the update.
Exploitation
- No evidence of exploitation in the wild found.
- CISA SSVC assessment: Exploitation none, not automatable.
- No public proof-of-concept found.
- EPSS score 0.0037 (low).
Our recommendation
- Update Google Chrome to 156.0.8078.47 or later on all workstations, and verify the version via Menu > Help > About Google Chrome.
- Check that other Chromium-based browsers (Edge, Brave, Vivaldi, etc.) are also updated.
- In managed environments, make sure automatic updates are enabled and not blocked by policy.
- Remind users not to open links from untrusted sources and to be careful on unknown websites.
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 513452101 issues.chromium.org
- Microsoft Security Update Guide CVE-2026-112999 msrc.microsoft.com
- NVD mirror (Vulners) CVE-2026-112999 vulners.com
- Ubuntu security notice CVE-2026-112999 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 31 Oct 2026, 15:06.
Original description (NVD)
Use after free in API 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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