Google Chrome: Use after free in Extensions allows code execution in sandbox
Summary
A use-after-free flaw in the Extensions component of Google Chrome before 156.0.8078.47 allows a remote attacker to execute arbitrary code inside the browser sandbox. The attacker needs to lure a user to a crafted HTML page; no account is required. The CVSS base score is 8.8 (NVD), while the Chromium severity is rated Medium.
Affected
- Google Chrome prior to 156.0.8078.47 (per CVE description)
- Microsoft Edge and other Chromium-based builds: affected status unknown, build numbers not confirmed
Fixed in
- Google Chrome 156.0.8078.47 (Linux and Android, per secondary coverage)
- Google Chrome 156.0.8078.47 or .48 (Windows and macOS, per secondary coverage)
- Vendor advisory text not confirmed; verify against the Chrome Releases post
- Debian and FreeBSD package versions: unknown
Workaround
Unknown. No CVE-specific interim mitigation found. Updating Chrome is the remedy.
Exploitation
- No in-the-wild exploitation known (release-level statement, not CVE-specific)
- No public proof of concept found
- CISA SSVC: exploitation none, automatable no, technical impact total
- VulDB estimates an exploit market value of USD 5,000 to 25,000 (estimate, not evidence of use)
Our recommendation
- Update Chrome on all endpoints to 156.0.8078.47 or later and restart the browser after updating
- Verify the installed version on every endpoint and confirm the rollout via managed policy
- Update Chromium-based Edge endpoints to the vendor-fixed build once confirmed
- Limit extension installations to an approved list, since the flaw sits in the extensions component
- Monitor for unusual browser behaviour on endpoints
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 514080341 issues.chromium.org
- Microsoft Security Update Guide: CVE-2026-113278 msrc.microsoft.com
- Vulners: CVE-2026-113278 vulners.com
- VulDB 424607 vuldb.com
- Cybersecurity News: Chrome security update fixing 353 flaws cybersecuritynews.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, 12:23.
Original description (NVD)
Use after free in Extensions 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: 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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