Google Chrome: Incorrect reference resolution in Extensions on macOS
Summary
Google Chrome on macOS contains an incorrect reference resolution flaw in the Extensions component (CWE-706). A remote attacker who has already compromised the renderer process can use a crafted Chrome extension to execute arbitrary code outside the browser sandbox. The CVSS vector (AC:H, UI:R, S:C) reflects a complex attack that requires user interaction, and the flaw is a second-stage bug rather than a standalone entry point.
Affected
- Google Chrome on macOS prior to 155.0.8059.79
Fixed in
- Google Chrome 155.0.8059.79 or later for macOS (Google's 13 October 2026 Stable Channel Update lists 155.0.8059.79/.80 for Mac; use the latest stable build)
Workaround
- Unknown. No vendor-documented workaround. Applying the update is the remediation.
Exploitation
- CISA SSVC assessment: exploitation none, not automatable, total technical impact.
- Not listed in CISA KEV according to a third-party aggregator (not verified on the CISA site).
- EPSS is low (0.21% to 0.298%, depending on the source).
- No public proof of concept found; this does not prove none exists.
- No statement found that the flaw is exploited in the wild.
Our recommendation
- Update Chrome on all Macs to the latest stable version.
- Verify that Chrome auto-update works on managed and stalled devices, and check for Macs that have not updated since mid-October 2026.
- In managed fleets, restrict extension installation to an approved list.
- Monitor for unexpected or unknown browser extensions.
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 561892119 issues.chromium.org
- Ubuntu security notice CVE-2026-110156 ubuntu.com
- Debian OSV entry CVE-2026-110156 osv.dev
- Vulners VulnRichment CVE-2026-110156 vulners.com
- GitHub aggregator issue 1987 (KEV and EPSS data) github.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 1 Nov 2026, 13:47.
Original description (NVD)
Incorrect reference resolution in Extensions in Google Chrome on on Mac prior to 155.0.8059.79 allowed a remote attacker who had compromised the renderer process to execute arbitrary code outside the sandbox via a crafted Chrome extension. (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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