Google Chrome: Use-after-free in ServiceWorker
Summary
Google Chrome versions before 156.0.8078.47 contain a use-after-free flaw (CWE-416) in ServiceWorker. A remote attacker can lure a user to a crafted HTML page and execute arbitrary code inside the browser sandbox. No user interaction beyond loading the page is described, and the CVSS vector requires user interaction (UI:R).
Affected
- Google Chrome before 156.0.8078.47 (desktop)
- Downstream Chromium-based browsers, such as Microsoft Edge, may be affected until they ship the fix
Fixed in
- Google Chrome 156.0.8078.47 or later (minimum build per the CVE record)
- Newer stable builds are available; deploy the latest stable release
- Unknown: whether the vendor advisory lists this CVE explicitly
Workaround
- Unknown. No vendor-documented workaround. Applying the update is the remedy.
Exploitation
- No evidence of exploitation in the wild found in the research (CISA KEV status not directly verified).
- No public proof of concept found.
- CISA SSVC: Exploitation none, Automatable no, Technical Impact total.
Our recommendation
- Update Google Chrome to the latest stable build on all workstations now, not only to 156.0.8078.47.
- Use managed auto-update or a central browser policy and verify the installed version.
- Prioritise systems that browse untrusted sites or handle sensitive data.
- Check other Chromium-based browsers in use (for example Microsoft Edge) and update them too.
- Monitor vendor advisories for further fixes.
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 vulners.com
- Strix CVE summary www.strix.ai
- HKCERT security bulletin (Microsoft Edge) www.hkcert.org
- Ubuntu security tracker ubuntu.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, 12:02.
Original description (NVD)
Use after free in ServiceWorker 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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