Google Chrome: Use-after-free in SignIn allows code execution in sandbox
Summary
A use-after-free flaw in the SignIn component of Google Chrome allows a remote attacker to execute arbitrary code inside the browser sandbox. The attacker needs to lure the user to a crafted HTML page, and no login is required. CISA's SSVC assessment rates the technical impact as total, but exploitation is rated none and the bug is not automatable, and Chromium rates the severity as Low.
Affected
- Google Chrome prior to 156.0.8078.47
- Earliest affected version: Unknown.
- Microsoft Edge (Chromium-based) consumes the same Chromium code and is reported as affected; exact Edge versions were not verified against the vendor entry.
- Other Chromium-based browsers: likely affected, not verified.
Fixed in
- Google Chrome 156.0.8078.47 (Linux). Windows and Mac builds are listed as 156.0.8078.47 or 156.0.8078.48 in secondary sources.
- Debian and Ubuntu fixed package versions: Unknown.
Workaround
- No workaround. Install the vendor update.
Exploitation
- CISA SSVC: exploitation none, automatable no, technical impact total.
- No public proof-of-concept or in-the-wild exploitation found in the sources; searches were not exhaustive.
- Not confirmed in the CISA KEV catalogue.
Our recommendation
- Update Chrome and Microsoft Edge to the fixed builds on all endpoints.
- Make sure the update is applied and restart browsers so the new build is active.
- Verify the build number on managed devices, not only that an update was pushed.
- Check Linux systems for the fixed chromium package or Chromium snap revision from the distribution.
- Monitor for unusual browser crashes or sandbox-related alerts until all systems are patched.
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
- Microsoft Security Update Guide: CVE-2026-113114 msrc.microsoft.com
- Ubuntu CVE tracker: CVE-2026-113114 ubuntu.com
- HKCERT security bulletin: Microsoft Edge multiple vulnerabilities www.hkcert.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, 13:55.
Original description (NVD)
Use after free in SignIn in Google Chrome 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: Low)
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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