Google Chrome: Memory corruption in ServiceWorker
Summary
Google Chrome desktop versions prior to 156.0.8078.47 contain a memory corruption flaw in ServiceWorker (CWE-119). A remote attacker can use a crafted HTML page to potentially execute arbitrary code outside the browser sandbox. Exploitation requires that a user visits the crafted page; Google rates the issue Medium, while NVD lists a CVSS 3.1 score of 9.6 (Critical) in the supplied data.
Affected
- Google Chrome desktop builds prior to 156.0.8078.47 (CVE description).
- Per secondary sources: Windows and macOS builds before 156.0.8078.47 or 156.0.8078.48; Linux builds before 156.0.8078.47.
- Microsoft Edge (Chromium) prior to 156.0.4314.42.
- Ubuntu chromium-browser package: not affected; the installed Chromium snap must be checked.
- Android Chrome: a secondary source lists builds before 156.0.8078.47, not confirmed for this CVE.
Fixed in
- Google Chrome 156.0.8078.47 or later (Linux); 156.0.8078.47 or 156.0.8078.48 or later (Windows, macOS) according to secondary sources.
- Microsoft Edge 156.0.4314.42 or later.
- Verify the exact version against the Chrome Releases post.
Workaround
- No vendor-documented workaround. Apply the browser update.
- Restart the browser after updating, as the old process may still run.
- Unknown: whether any Chrome policy reduces ServiceWorker exposure.
Exploitation
- CISA KEV: not listed.
- Exploited in the wild: no evidence found; secondary coverage reports no known exploitation of the Chrome 156 release in general.
- EPSS: 0.00451 (Vulners).
- Public proof of concept: unknown.
Our recommendation
- Inventory all Chrome, Edge and other Chromium-based browsers, including Linux snap installs.
- Update Chrome to 156.0.8078.47 or later (Linux) or 156.0.8078.47/.48 or later (Windows, macOS), and Edge to 156.0.4314.42 or later.
- Restart browsers after the update and enforce updates on managed devices.
- Re-check the NVD score and the Chrome advisory for sandbox wording and exploitation status.
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
- Ubuntu CVE tracker ubuntu.com
- HKCERT security bulletin (Microsoft Edge) www.hkcert.org
- Chrome 156 security update summary (Cybersecurity News) cybersecuritynews.com
- Security notice Google Chrome 156 stable (TechGeeks) www.techgeeks.org
- Chrome 156 security update (Windows Forum) windowsforum.com
- Vulners EPSS record vulners.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, 22:30.
Original description (NVD)
Memory corruption in ServiceWorker in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to potentially execute arbitrary code outside 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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