CVE-2026-5891 — MEDIUM (4.3)

Q: How severe is CVE-2026-5891?

CVE-2026-5891 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2026-5891?

Check the references section above for vendor advisories and patch information. Affected products include: Google Chrome, Apple Macos, Linux Linux Kernel, Microsoft Windows.

Vulnerability 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)

CVSS Score

4.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

LOW

Affected Products

Vendor	Product	Versions
Google	Chrome	< 147.0.7727.55
Apple	Macos	-
Linux	Linux Kernel	-
Microsoft	Windows	-

Related Weaknesses (CWE)

CWE-451

References

https://chromereleases.googleblog.com/2026/04/stable-channel-update-for-desktop.Release NotesVendor Advisory
https://issues.chromium.org/issues/487471101Issue TrackingPermissions Required

FAQ

What is CVE-2026-5891?

CVE-2026-5891 is a vulnerability with a CVSS score of 4.3 (MEDIUM). 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....

How severe is CVE-2026-5891?

CVE-2026-5891 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-5891?

Check the references section above for vendor advisories and patch information. Affected products include: Google Chrome, Apple Macos, Linux Linux Kernel, Microsoft Windows.