Google Chrome for iOS: Memory corruption in Navigation component
Summary
A memory corruption flaw in the Navigation component of Google Chrome on iOS allows a remote attacker to potentially execute arbitrary code inside the browser sandbox. The attacker must lure a user into opening a crafted HTML page, and no authentication is required. The CVSS 3.1 base score is 8.8 (High), while Google rates the Chromium security severity as Medium.
Affected
- Google Chrome on iOS prior to 156.0.8078.47
- Desktop and other platforms are not covered by this CVE entry according to the CVE scope (Ubuntu lists its Chromium packages as not affected)
Fixed in
- Chrome 156.0.8078.47 or later as stated in the CVE description
- The iOS build that first contains the fix is not clearly documented. Google's iOS release notes list 156.0.8078.46 on 20 October 2026, which is below the fixed version. Wikipedia lists 156.0.8078.54 for iOS on 23 October 2026. Verify the current version before relying on it.
Workaround
- No vendor workaround known.
- Users may switch to Safari to reduce exposure to this Chrome component. This is a precaution, not a vendor recommendation.
Exploitation
- No evidence of exploitation in the wild found.
- No public proof of concept found.
- CISA SSVC assessment: Exploitation none, Automatable no, Technical Impact total.
- EPSS score of 0.00434 (very low).
Our recommendation
- Update Chrome on iOS to the latest version from the App Store, and push the update via MDM where possible.
- Prioritise devices that handle sensitive data or business email.
- Remind users not to open links from untrusted emails or messages.
- Monitor Google's Chrome for iOS release notes for the exact fixed build.
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
- Chrome Releases: Chrome Stable for iOS update chromereleases.googleblog.com
- Chromium issue tracker 429432679 issues.chromium.org
- NVD record via Vulners vulners.com
- Ubuntu CVE tracker ubuntu.com
- Google Chrome (Wikipedia) en.wikipedia.org
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, 11:56.
Original description (NVD)
Memory corruption in Navigation in Google Chrome on on iOS 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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