Vulnerability · Published Oct 6, 2026 · Assigned by Chrome
CVE-2026-106378
High 8.3
In plain English
A high-severity security flaw in Chrome from Google. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 25% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | chromium | 155.0.8059.39-1~deb12u1 | DEBIAN-CVE-2026-106378 |
| Debian:13 | chromium | 155.0.8059.39-1~deb13u1 | DEBIAN-CVE-2026-106378 |
| Debian:14 | chromium | 155.0.8059.39-1 | DEBIAN-CVE-2026-106378 |
Affected products (as reported)
Weakness: CWE-250 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H