Vulnerability · Published Apr 8, 2026 · Assigned by Chrome
CVE-2026-5891
Medium 4.3
In plain English
A medium-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 0.2% (higher than 12% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)4.3Medium
Exploit odds (30 days)0.2%top 88.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Insufficient policy enforcement in browser UI in Google Chrome prior to 147.0.7727.55 allowed a remote attacker who had compromised the renderer process to perform UI spoofing via a crafted HTML page. (Chromium security severity: Medium)
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.23 | qt6-qtwebengine | 6.10.3-r1 | ALPINE-CVE-2026-5891 |
| Alpine:v3.24 | qt6-qtwebengine | 6.11.0-r4 | ALPINE-CVE-2026-5891 |
| Debian:12 | chromium | 147.0.7727.55-1~deb12u1 | DEBIAN-CVE-2026-5891 |
| Debian:13 | chromium | 147.0.7727.55-1~deb13u1 | DEBIAN-CVE-2026-5891 |
| Debian:14 | chromium | 147.0.7727.55-1 | DEBIAN-CVE-2026-5891 |
Affected products (as reported)
Weakness: CWE-451 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L