Google Chrome: Improper input validation in Downloads allows code execution
Summary
Google Chrome versions prior to 156.0.8078.47 contain an improper input validation flaw in the Downloads component. A remote attacker who lures a user to a crafted HTML page could potentially execute arbitrary code inside the browser sandbox. The attack requires user interaction (opening the page) but no prior authentication. The Chromium security severity is Medium, and the CVSS 3.1 base score in the CVE data is 8.8.
Affected
- Google Chrome (desktop) prior to 156.0.8078.47
- Chromium-based products that include the affected Chromium code, such as Microsoft Edge and Linux Chromium packages (vendor confirmation for each product not verified)
Fixed in
- Google Chrome 156.0.8078.47 or later (Chrome 156 stable channel)
- Use the newest Chrome 156 stable build; the vendor release page was not verified for exact later builds
Workaround
- None known. The fix is a browser update.
Exploitation
- CISA SSVC assessment: exploitation none, not automatable, technical impact total.
- No public proof-of-concept found.
- Known exploitation: unknown beyond vendor and tracker data; KEV listing not verified.
Our recommendation
- Update Google Chrome to 156.0.8078.47 or later on all workstations.
- Also update Chromium-based browsers, including Microsoft Edge and Chromium snaps on Linux.
- Restart the browser after updating, because the update does not apply until relaunch.
- Reinforce user awareness against phishing links to untrusted web pages.
- Monitor the vendor advisory for changes to severity or 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 518055043 issues.chromium.org
- Microsoft Security Update Guide: CVE-2026-113195 msrc.microsoft.com
- VulDB entry 424548 vuldb.com
- Ubuntu security: CVE-2026-113195 ubuntu.com
- Chrome 156 security update coverage (CybersecurityNews) cybersecuritynews.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, 13:07.
Original description (NVD)
Improper input validation in Downloads 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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