Google Chrome: Use after free in Internals component on macOS
Summary
A use-after-free flaw in the Internals component of Google Chrome on macOS allows a remote attacker to execute arbitrary code inside the browser sandbox. The attacker must lure a user to a crafted HTML page, for example via phishing or a malicious website. Google rates the issue Medium in Chromium, and the CVSS base score is 8.8; no in-the-wild exploitation or public proof of concept was found.
Affected
- Google Chrome for macOS prior to 156.0.8078.47
- The CNA version data is inconsistent; 156.0.8078.47 is used as the working threshold
Fixed in
- Google Chrome 156.0.8078.47 or later for macOS
- Install the newest stable build; later builds reported on October 27, 2026 (156.0.8078.73/.74)
- Downstream Chromium packages (Debian DSA 6577-1, DLA 4853-1): fixed versions unknown
Workaround
Unknown. Updating is the recommended fix; no mitigation is documented in the sources reviewed.
Exploitation
- Exploited in the wild: no evidence found
- Public proof of concept: none found
- CISA SSVC: Exploitation none, Automatable no, Technical Impact total
- EPSS was about 0.004 at the time of the cached records
Our recommendation
- Check the Chrome version on all Macs (chrome://version) and confirm at least 156.0.8078.47, preferably the latest stable release
- Confirm that managed devices received the latest stable build and force a browser restart where updates are pending
- Check Edge and other Chromium-based browsers on Macs for their own patch levels
- Verify the NVD status and CVSS score before using them in client reports
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
- Ubuntu security CVE-2026-113191 ubuntu.com
- Vulners CVE record CVE-2026-113191 vulners.com
- Vulners Microsoft advisory MS:CVE-2026-113191 vulners.com
- Malwarebytes: Chrome and Firefox updates fix serious security flaws www.malwarebytes.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, 13:14.
Original description (NVD)
Use after free in Internals in Google Chrome on on Mac prior to 156.0.8078.47 allowed a remote attacker to execute arbitrary code inside 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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