Google Chrome: Buffer overflow in Compositing allows sandbox escape
Summary
Google Chrome before 157.0.8103.50 contains a buffer overflow in the Compositing component. A remote attacker who has already compromised the renderer process can execute arbitrary code outside the sandbox by luring a user to a crafted HTML page. The attack works only as a second step in a chained exploit. NVD analysis was still pending at publication.
Affected
- Google Chrome prior to 157.0.8103.50 (Desktop)
- Chromium-based browsers may share the affected code; vendor status unconfirmed for some of them
Fixed in
- Google Chrome 157.0.8103.50 or later (Stable channel, released 9 November 2026)
Workaround
- No workaround documented. Install the browser update.
- Restart Chrome after updating, as the update applies only after a relaunch.
Exploitation
- No evidence of in-the-wild exploitation for this CVE. The exploited zero-day in the same release is CVE-2026-125350.
- Not listed in CISA KEV as of 10 November 2026 according to a third-party tracker; recheck CISA KEV directly.
- No public proof-of-concept found as of 10 November 2026.
Our recommendation
- Update all managed Chrome installations to 157.0.8103.50 or later and prioritise this update because it was shipped alongside an actively exploited zero-day.
- Verify that browsers have been restarted after the update.
- Check Extended Stable endpoints and Chromium-based browsers such as Edge separately, since their fix status may differ.
- Monitor for unusual browser behaviour and keep users aware of phishing links.
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
- Cybersecurity News: Google Chrome zero-day exploited cybersecuritynews.com
- OffSeq Radar: CVE-2026-125343 radar.offseq.com
- Digital Citizen: Chrome 157 emergency update www.digitalcitizen.life
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 11 Nov 2026, 01:24.
Original description (NVD)
Buffer overflow in Compositing in Google Chrome prior to 157.0.8103.50 allowed a remote attacker who had compromised the renderer process to execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: High)
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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