Google Chrome: Improper input validation in Metrics component
Summary
Improper input validation in the Metrics component of Google Chrome on macOS before 156.0.8078.73 can be abused by a remote attacker. A crafted HTML page can potentially execute arbitrary code inside the browser sandbox. The attack requires that a user opens the malicious page, for example via a link in an email or on a website.
Affected
- Google Chrome on macOS prior to 156.0.8078.73
- The CNA range text is internally inconsistent; the description confirms the boundary.
Fixed in
- Google Chrome on macOS 156.0.8078.73 or later (Mac build listed as 156.0.8078.74)
- Windows and Linux: the same Stable release covers them, but the CVE text covers macOS only.
Workaround
- No vendor workaround identified. Updating is the fix.
- VulDB suggests enabling Site Isolation as defence-in-depth. This is not a Google recommendation and is unverified.
Exploitation
- Not listed in CISA KEV according to a third-party tracker; not verified directly.
- No evidence of exploitation in the wild reported as of 26 Oct 2026.
- No public proof of concept found.
- CISA SSVC: exploitation none, automatable no, technical impact total.
Our recommendation
- Confirm Chrome on Macs is 156.0.8078.73 or later (156.0.8078.74 listed).
- Enforce Chrome auto-update via MDM or policy and require browser restarts.
- Check Windows and Linux Chrome builds as well, since the release covers them.
- Prioritise Macs with Chrome and users who browse untrusted sites; patch within days.
- Confirm the CVSS score at NVD before reporting, as trackers disagree.
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-2026-118335 vuldb.com
- OffSeq Radar CVE-2026-118335 radar.offseq.com
- Strix CVE-2026-118335 www.strix.ai
- MacUpdate Google Chrome google-chrome.macupdate.com
- GitHub tracker astruzocyber CVE issue 3401 github.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, 09:58.
Original description (NVD)
Improper input validation in Metrics in Google Chrome on on Mac prior to 156.0.8078.73 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.
Affected? We can help.
We check whether your systems are affected, install updates and close the gap – continuously with the System Health Checker if you wish.