Google Chrome for Android: Use-after-free in CustomTabs
Summary
A use-after-free vulnerability in the CustomTabs component of Google Chrome for Android allows a remote attacker to execute arbitrary code inside the browser sandbox. Exploitation requires a victim to open a crafted HTML page, for example via a link in an email, a message or an app that opens web pages through Custom Tabs. The impact is limited to the sandbox, so full device compromise would require additional flaws. The CVSS 3.1 base score is 8.8 (High); Chromium rates the issue Medium.
Affected
- Google Chrome for Android prior to 156.0.8078.47
Fixed in
- Google Chrome for Android 156.0.8078.47 (released 20 October 2026)
Workaround
Unknown. No vendor-documented workaround. Updating Chrome is the remedy.
Exploitation
- Not reported as exploited in the wild (the statement covers the Chrome 156 update wave in general, not this CVE specifically)
- A third-party tracker lists it as not in the CISA KEV catalogue; not confirmed on the CISA site
- No public proof of concept found
- EPSS 0.0039 (Vulners)
Our recommendation
- Confirm that Chrome for Android is at 156.0.8078.47 or later on all company devices
- Enforce updates via Google Play, MDM or a Play Store policy
- Prioritise mobile devices with weak update enforcement
- Remind users to be careful with links in unexpected emails and messages
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
- Vulners CVE record CVE-2026-113255 vulners.com
- Wikipedia: Google Chrome 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, 12:32.
Original description (NVD)
Use after free in CustomTabs in Google Chrome on on Android prior to 156.0.8078.47 allowed a remote attacker to 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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