Google Chrome for iOS: Missing authorization enables sandbox escape
Summary
Missing authorization in Chrome for iOS allows a remote attacker to potentially execute arbitrary code outside the browser sandbox. The attacker needs the victim to open a crafted HTML page, typically reached through social engineering such as a phishing link. The CVSS score is 9.6 (critical), and Chromium rates the issue as High.
Affected
- Google Chrome for iOS prior to 155.0.8059.39 (per CVE record)
- Unclear: the iOS build number for the fix is not confirmed. One source names 155.0.8059.37 as the iOS release of Chrome 155, which is below the threshold.
Fixed in
- Chrome for iOS 155.0.8059.39 or later per the CVE record. Confirm the exact iOS build in the Chrome Releases notes and App Store release notes.
- Chrome for iOS is updated only through the App Store.
Workaround
- Unknown. No vendor-issued workaround is known.
Exploitation
- CISA SSVC: exploitation none, automatable no, technical impact total.
- Not listed as known exploited (KEV).
- No public proof of concept or in-the-wild reports found. This search was limited and does not prove absence.
Our recommendation
- Update Chrome on all iPhones and iPads through the App Store. Verify the installed build against the vendor notes once the iOS build number is confirmed.
- Enforce a minimum Chrome version for iOS via MDM where available.
- Instruct staff not to open links from unknown senders in the browser until the update is installed.
- Prioritise devices that handle business email, cloud logins or customer data.
- Recheck exploitation status in the coming days.
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 entry issues.chromium.org
- OSV: DEBIAN-CVE-2026-106323 osv.dev
- CISA Security Advisory: Multiple vulnerabilities in Google Chrome (CIS) www.cisecurity.org
- CISA ADP Vulnrichment assessment (HOL) hol.org
- Strix CVE-2026-106323 www.strix.ai
- gHacks: Google releases Chrome 155 with 247 security fixes www.ghacks.net
- SecurityWeek: Chrome 155 update patches 247 vulnerabilities www.securityweek.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, 23:15.
Original description (NVD)
Missing authorization in Chrome for iOS in Google Chrome on on iOS prior to 155.0.8059.39 allowed a remote attacker leveraging social engineering 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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