Google Chrome: Improper input validation in CacheStorage
Summary
Google Chrome versions before 156.0.8078.79 contain an improper input validation flaw in the CacheStorage component. A remote attacker can potentially execute arbitrary code inside the browser sandbox by luring a user to a crafted HTML page. No login is required, but the victim must open the page.
Affected
- Google Chrome prior to 156.0.8078.79
- Note: the affected range is described inconsistently across sources; VulDB lists up to 156.0.8078.73.
Fixed in
- Google Chrome 156.0.8078.79 or later (Windows/macOS: 156.0.8078.80 per the vendor advisory; Linux: 156.0.8078.79)
Workaround
- No vendor-published workaround. Apply the update.
Exploitation
- No evidence of exploitation in the wild or public exploit code as of 29-30 October 2026 (third-party data).
- Not verified: the Chrome advisory text could not be checked for exploitation status.
Our recommendation
- Verify the installed Chrome build on all endpoints (chrome://version) and ensure it is 156.0.8078.79 or later.
- Force a browser relaunch on machines with a pending update and enforce updates on managed devices.
- Check other Chromium-based products in use for their own patch status.
- Monitor the Chromium bug and the Chrome advisory for changes in exploitation status.
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
- VulDB CVE-2026-119270 vuldb.com
- OffSeq threat radar CVE-2026-119270 radar.offseq.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, 08:56.
Original description (NVD)
Improper input validation in CacheStorage in Google Chrome prior to 156.0.8078.79 allowed a remote attacker to potentially execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: High)
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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