Vulnerability · Published Oct 27, 2026 · Assigned by Chrome
CVE-2026-118306
Critical 9.6
In plain English
A critical-severity use-after-free 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 0.4% (higher than 31% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)9.6Critical
Exploit odds (30 days)0.4%top 69.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack tooling1Public PoC
Official description
Use after free in FileSystem in Google Chrome prior to 156.0.8078.73 allowed a remote attacker to execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Critical)
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | chromium | 156.0.8078.73-1~deb12u1 | DEBIAN-CVE-2026-118306 |
| Debian:13 | chromium | 156.0.8078.73-1~deb13u1 | DEBIAN-CVE-2026-118306 |
| Debian:14 | chromium | 156.0.8078.73-1 | DEBIAN-CVE-2026-118306 |
Affected products (as reported)
Weakness: CWE-416 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H