CVE-2026-106378

Severity: high (CVSS 8.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-06 · updated 2026-10-07
Weakness: CWE-250

Description

Privilege elevation in Sandbox in Google Chrome on on Mac prior to 155.0.8059.39 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: Medium)

Affected products

Google Chrome: before 155.0.8059.39 — fixed in 155.0.8059.39

How to fix

Upgrade to a fixed version: Google Chrome 155.0.8059.39. Check the vendor advisory for mitigations.

References

https://chromereleases.googleblog.com/2026/10/stable-channel-update-for-desktop_086471744.html
https://issues.chromium.org/issues/507596239

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