Vulnerability · Published Oct 27, 2026 · Assigned by Chrome
CVE-2026-118318
Medium 4.3
In plain English
A medium-severity heap buffer overflow 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 20% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)4.3Medium
Exploit odds (30 days)0.3%top 79.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Buffer overflow in V8 in Google Chrome prior to 156.0.8078.73 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: High)
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | chromium | 156.0.8078.73-1~deb12u1 | DEBIAN-CVE-2026-118318 |
| Debian:13 | chromium | 156.0.8078.73-1~deb13u1 | DEBIAN-CVE-2026-118318 |
| Debian:14 | chromium | 156.0.8078.73-1 | DEBIAN-CVE-2026-118318 |
Affected products (as reported)
Weakness: CWE-122 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N