Google Chrome: Improper input validation in UI on Android
Summary
Improper input validation in the user interface of Google Chrome for Android allows a remote attacker to potentially execute arbitrary code outside the browser sandbox. The attack requires a victim to open a crafted HTML page, so no prior authentication is needed but user interaction is. NVD rates the issue CVSS 9.6 (critical), while other trackers rate it lower, so the score is contested.
Affected
- Google Chrome for Android prior to 156.0.8078.73
Fixed in
- Google Chrome for Android 156.0.8078.73 or later (the newest available build is recommended)
Workaround
- No vendor workaround known. Apply the update and restart Chrome.
Exploitation
- No public exploit code found at the time of research.
- Not known to be exploited in the wild according to an exploitation tracker.
- Not listed in CISA KEV at the last check. Recheck before closing the ticket.
Our recommendation
- Inventory Android Chrome versions via MDM or Google Play management and confirm 156.0.8078.73 or later.
- Enforce Play Store updates and browser restarts on managed devices, with priority on phones and tablets that handle sensitive data.
- Recheck CISA KEV and exploit databases in the coming days.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Google Chrome Releases: Stable Channel Update for Desktop chromereleases.googleblog.com
- Chromium issue 576133777 issues.chromium.org
- Ubuntu CVE tracker: CVE-2026-118309 ubuntu.com
- VulDB: CVE-2026-118309 (vuln 427593) vuldb.com
- Red Hat CVE listing via Vulners vulners.com
- OffSeq Radar: CVE-2026-118309 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 30 Oct 2026, 22:04.
Original description (NVD)
Improper input validation in UI in Google Chrome on on Android prior to 156.0.8078.73 allowed a remote attacker to potentially execute arbitrary code outside 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.
Affected? We can help.
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