Google Chrome: Memory corruption in PolicyContainer
Summary
Memory corruption in the PolicyContainer component of Google Chrome allows a remote attacker to potentially execute arbitrary code outside the browser sandbox. The attacker needs a victim to open a crafted HTML page, so web browsing and email links are the main risk. NVD and Microsoft rate the issue 9.6 (Critical), while VulDB rates it 6.3 (Medium); Chromium rates it Medium. No exploitation in the wild is known.
Affected
- Google Chrome desktop prior to 156.0.8078.47
- Chromium-based browsers and packages that include the affected Chromium code (e.g. Microsoft Edge), with their own fixed versions
- Affected range per VulDB: up to 155.0.8059.84
Fixed in
- Google Chrome 156.0.8078.47 or later (desktop Stable, released 20 October 2026)
- Some Windows and Mac users may see 156.0.8078.48
- Android, iOS and ChromeOS builds: Unknown.
- Chromium-based browsers: fixed versions Unknown.
Workaround
- None. Updating the browser is the fix; no vendor workaround is required.
Exploitation
- Not listed in CISA KEV according to third-party trackers; the CISA KEV catalogue was not checked directly.
- Chromium's release record does not state in-the-wild exploitation.
- No public proof of concept or exploit found. This does not prove that none exists.
Our recommendation
- Check the Chrome version on all endpoints, including Chromium-based browsers and Linux packages. Target 156.0.8078.47 or later.
- Restart the browser on devices that still run older builds.
- Confirm that Microsoft Edge and other Chromium-based browsers have received their own updates.
- Monitor the Chrome Releases post and the Chromium bug for changes, including KEV listing or public PoC reports.
- Prioritise this as a high-priority browser update within the normal critical patch cycle.
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
- Microsoft MSRC update guide entry msrc.microsoft.com
- VulDB entry vuldb.com
- Vulners CVE list entry vulners.com
- Strix CVE mirror www.strix.ai
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 30 Oct 2026, 22:34.
Original description (NVD)
Memory corruption in PolicyContainer in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to potentially execute arbitrary code outside 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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