Google Chrome: Sandbox escape via incomplete cleanup in Dawn
Summary
Google Chrome versions before 155.0.8059.39 contain an incomplete cleanup flaw in Dawn, the WebGPU implementation used by Chrome. A remote attacker can create a crafted HTML page that may lead to arbitrary code execution outside the browser sandbox. The attack requires the user to open the malicious page, and an attacker would likely need to combine this with a second exploit to reach the sandbox boundary.
Affected
- Google Chrome desktop prior to 155.0.8059.39
- Chromium-based builds that include the affected Dawn code until they are updated
Fixed in
- Google Chrome 155.0.8059.39 (Linux) or later
- Google Chrome 155.0.8059.39/.40 (Windows and Mac) or later
- Debian 12 chromium 155.0.8059.39-1~deb12u1
- Later Chrome 155 point releases contain further fixes; use the latest stable build
Workaround
Unknown. No vendor workaround was found; apply the update.
Exploitation
- Google rates the issue Medium (Chromium security severity)
- CISA SSVC: Exploitation none, Automatable no, Technical Impact total
- Not listed as known exploited (KEV)
- No public proof of concept found; EPSS approx. 0.004
Our recommendation
- Update Chrome on all Windows, Mac and Linux endpoints to the latest stable build
- Update Chromium-based browsers such as Microsoft Edge and Linux distribution chromium packages
- Verify installed versions centrally and report endpoints still running older builds
- Restrict browsing from unmanaged devices where possible and keep content filtering active
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
- HKCERT security bulletin www.hkcert.org
- OSV: Debian CVE record osv.dev
- SUSE CVE record (Vulners) vulners.com
- Microsoft CVE record (Vulners) vulners.com
- CISA ADP SSVC (HOL) hol.org
- OpenCVE record app.opencve.io
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, 23:13.
Original description (NVD)
Incomplete cleanup in Dawn in Google Chrome prior to 155.0.8059.39 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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