Vulnerability · Published Apr 8, 2026 · Assigned by Chrome
CVE-2026-5858
High 8.8
In plain English
A high-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 0.6% (higher than 50% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.6%top 50.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Heap buffer overflow in WebML in Google Chrome prior to 147.0.7727.55 allowed a remote attacker to execute arbitrary code via a crafted HTML page. (Chromium security severity: Critical)
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | chromium | 147.0.7727.55-1~deb12u1 | DEBIAN-CVE-2026-5858 |
| Debian:13 | chromium | 147.0.7727.55-1~deb13u1 | DEBIAN-CVE-2026-5858 |
| Debian:14 | chromium | 147.0.7727.55-1 | DEBIAN-CVE-2026-5858 |
Affected products (as reported)
Weakness: CWE-122 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H