Google Chrome: Buffer overflow in WebRTC allows code execution in sandbox
Summary
Google Chrome before 154.0.8037.97 contains a buffer overflow (CWE-122) in the WebRTC component, which handles real-time audio, video and peer-to-peer connections. A remote attacker can use a crafted HTML page to execute arbitrary code inside the browser sandbox. The attack requires that a user opens the malicious page, and no privileges are needed. The NVD base score is 8.8 (High).
Affected
- Google Chrome versions before 154.0.8037.97 (Windows, macOS, Linux)
Fixed in
- Google Chrome 154.0.8037.97 or later (Windows and macOS: 154.0.8037.97/.98; Linux: 154.0.8037.97) - ChromeOS build 16805.33.0 (Browser 154.0.8037.151) or later - Debian chromium: see vendor tracker; Fedora chromium-154.0.8037.97-1.fc43 and later builds - Other Chromium-based browsers: unknown, check their vendor advisories
Workaround
Unknown. No interim workaround is documented; updating is the only confirmed mitigation.
Exploitation
No evidence of exploitation in the wild was found. No public proof of concept was found. CISA SSVC: Exploitation none, Automatable no, Technical Impact total. EPSS 0.0046 (low).
Our recommendation
- Verify that all Chrome installations run 154.0.8037.97 or later, or the ChromeOS build above - Update Linux and Chromium-based browser packages according to their vendor advisories - Enforce updates via managed policy where possible and verify the installed version afterwards - Monitor for vendor updates, since Chrome rollouts are phased and some systems may lag behind
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
- OSV: DEBIAN-CVE-2026-103631 osv.dev
- Chrome Releases: Stable Channel Update for ChromeOS chromereleases.googleblog.com
- Vulners: RAPID7:CVE-2026-103631 vulners.com
- Vulners: CVELIST:CVE-2026-103631 vulners.com
- Chrome for enterprise: update settings support.google.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, 22:45.
Original description (NVD)
Buffer overflow in WebRTC in Google Chrome prior to 154.0.8037.97 allowed a remote attacker to execute arbitrary code inside 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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