Google Chrome: Improper input validation in Core component
Summary
An improper input validation flaw in the Core component of Google Chrome on Android allows a remote attacker to potentially execute arbitrary code outside the browser sandbox. The attack requires a user to visit a crafted HTML page. NVD lists a CVSS score of 9.6 (Critical), while other sources list 8.8 or 6.3, and Google rates the bug High.
Affected
- Google Chrome on Android prior to 156.0.8078.73 (per the CVE description)
- The affected version range in the CVE record is internally inconsistent (156.0.8078.73 to < 156.0.8078.73); Unknown.
- Desktop platforms: Unknown (the release post covers desktop, but the CVE text names Android)
Fixed in
- Google Chrome for Android 156.0.8078.73 (per the CVE description)
- A later Chrome 156 update (156.0.8078.79 or .80) is reported by secondary sources; contents not verified against Google's release notes.
Workaround
- No vendor workaround known. Apply the update and restart the browser.
Exploitation
- Not known to be exploited. Not listed in CISA KEV at the time of research.
- CISA SSVC assessment: Exploitation none, Automatable no, Technical Impact total.
- No public proof of concept found.
Our recommendation
- Update Chrome on Android devices (via Google Play) and all desktop Chrome installations to the newest stable 156 build.
- Verify update status on managed devices, including BYOD phones with Chrome.
- Check other Chromium-based browsers and distribution packages for their own fixes.
- Patch the related CVE-2026-118306 in the same release, which is also a critical sandbox-escape-related flaw.
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 568937139 issues.chromium.org
- Ubuntu security notice CVE-2026-118321 ubuntu.com
- VulDB entry 427594 vuldb.com
- Vulners RedHat CVE-2026-118321 vulners.com
- BetaNews: Chrome and Firefox security patches betanews.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, 22:02.
Original description (NVD)
Improper input validation in Core 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.
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