Google Chrome: Out-of-bounds read in Navigation allows sandbox code execution
Summary
Google Chrome before 156.0.8078.47 contains an out-of-bounds read in the Navigation component (CWE-125). A remote attacker can potentially execute arbitrary code inside the browser sandbox by luring a user to a crafted HTML page. NVD rates the flaw CVSS 3.1 8.8 (High), and Google rates it Medium in its own severity scale.
Affected
- Google Chrome (desktop and Android) prior to 156.0.8078.47
- Chromium-based browsers that ingest this Chromium fix, such as Microsoft Edge, depending on their release
- Unknown: exact per-platform build numbers, as the vendor advisory could not be verified directly
Fixed in
- Linux: 156.0.8078.47
- Windows and macOS: 156.0.8078.47 or 156.0.8078.48, depending on rollout (secondary sources, to be verified in the vendor advisory)
- Android: 156.0.8078.47 (secondary source)
Workaround
- No workaround is documented. Update Chrome to the fixed build for your platform and restart the browser.
Exploitation
- In the wild: Unknown. The CVE is not listed in CISA KEV.
- Public proof of concept: none found.
- CISA SSVC: Exploitation none, Automatable no, Technical Impact total.
Our recommendation
- Check the Chrome version on all managed endpoints and update to at least the fixed build for each platform.
- Restart the browser after updating, as a staged update does not replace the running process.
- Confirm that Chromium-based browsers such as Edge are also updated.
- Treat this as a routine patch within the normal update cycle, with higher priority for staff who browse untrusted sites.
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 496650333 issues.chromium.org
- Microsoft MSRC update guide msrc.microsoft.com
- NVD mirror (Vulners) vulners.com
- Cybersecurity News: Chrome 156 security update cybersecuritynews.com
- Penligent: Chrome 156 security update www.penligent.ai
- VulDB entry vuldb.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, 14:58.
Original description (NVD)
Out of bounds read in Navigation in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to potentially 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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