CVE-2026-5891
published 2026-04-08CVE-2026-5891: 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…
PriorityP419medium4.3CVSS 3.1
AVNACLPRNUIRSUCNINAL
EPSS
0.21%
10.8th percentile
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
4 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | chromium | < chromium 147.0.7727.55-1 (sid) | chromium 147.0.7727.55-1 (sid) |
| chrome | < 147.0.7727.55 | 147.0.7727.55 | |
| chrome | >= 147.0.7727.55 < 147.0.7727.55 | 147.0.7727.55 | |
| chrome_chrome | — | — |
CVSS provenance
nvdv3.14.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
osv4.3MEDIUM
vendor_debian4.3MEDIUM
vendor_redhat4.3MEDIUM
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
VulDB
Google Chrome up to 146.0.7680.178 Browser UI ui layer (ID 487471 / WID-SEC-2026-1030)
vuldb·2026-04-11·CVSS 4.3
CVE-2026-5891 [MEDIUM] Google Chrome up to 146.0.7680.178 Browser UI ui layer (ID 487471 / WID-SEC-2026-1030)
A vulnerability was found in Google Chrome and classified as problematic. This affects an unknown part of the component Browser UI. Such manipulation leads to improper restriction of rendered ui layers.
This vulnerability is uniquely identified as CVE-2026-5891. The attack can be launched remotely. No exploit exists.
It is suggested to upgrade the affected component.
GHSA
GHSA-pwrx-g3gw-r3rq: Insufficient policy enforcement in browser UI in Google Chrome prior to 147
ghsa_unreviewed·2026-04-09
CVE-2026-5891 GHSA-pwrx-g3gw-r3rq: Insufficient policy enforcement in browser UI in Google Chrome prior to 147
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)
OSV
CVE-2026-5891: Insufficient policy enforcement in browser UI in Google Chrome prior to 147
osv·2026-04-08·CVSS 4.3
CVE-2026-5891 [MEDIUM] CVE-2026-5891: Insufficient policy enforcement in browser UI in Google Chrome prior to 147
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)
Chrome
Stable Channel Update for Desktop: CVE-2026-5891
vendor_chrome·2026-04-07·CVSS 4.3
CVE-2026-5891 [MEDIUM] Stable Channel Update for Desktop: CVE-2026-5891
Stable Channel Update for Desktop
CVE-2026-5891: Insufficient policy enforcement in browser UI. Reported by Tianyi Hu on 2026-02-25 [TBD][ 487568011 ] Medium CVE-2026-5892: Insufficient policy enforcement in PWAs
Reported by Tianyi Hu on 2026-02-25 [TBD][ 487768771 ] Medium CVE-2026-5893: Race in V8
Severity: medium
Red Hat
chromium-browser: Insufficient policy enforcement in browser UI
vendor_redhat·2026-04-07·CVSS 4.3
CVE-2026-5891 [MEDIUM] CWE-1021 chromium-browser: Insufficient policy enforcement in browser UI
chromium-browser: Insufficient policy enforcement in browser UI
An insufficient policy enforcement flaw was found in the browser UI component of the Chromium browser.
Upstream bug(s):
https://code.google.com/p/chromium/issues/detail?id=487471101
Statement: Red Hat Product Security rates the severity of this flaw as determined by the Google Chrome Security Advisory.
Debian
CVE-2026-5891: chromium - Insufficient policy enforcement in browser UI in Google Chrome prior to 147.0.77...
vendor_debian·2026·CVSS 4.3
CVE-2026-5891 [MEDIUM] CVE-2026-5891: chromium - Insufficient policy enforcement in browser UI in Google Chrome prior to 147.0.77...
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)
Scope: local
bookworm: open
bullseye: open
forky: open
sid: resolved (fixed in 147.0.7727.55-1)
trixie: open
No detection rules found.
No public exploits indexed.
Sans Isc
Microsoft Patch Tuesday April 2026., (Tue, Apr 14th)
blogs_sans_isc·2026-04-14·CVSS 8.8
[HIGH] Microsoft Patch Tuesday April 2026., (Tue, Apr 14th)
Microsoft Patch Tuesday April 2026.
Published: 2026-04-14. Last Updated: 2026-04-14 17:46:09 UTC
by Johannes Ullrich (Version: 1)
0 comment(s)
This month's Microsoft Patch Tuesday looks like a record one, but let's look at it a bit closer to understand what is happening
The update patches a total of 243 vulnerabilities. However, 78 of them are Chromium issues affecting Microsoft Edge. Patches for Edge were released earlier. This leaves 165 vulnerabilities that are not Edge-related. Of these, 8 are rated critical, and 154 are important. One vulnerability has already been exploited, and another was made public before today but has not yet been seen in the wild.
Noteworthy Vulnerabilities:
CVE-2026-33827 (Windows TCP/IP Remote Code Execution Vulnerability): As a packet nerd, I love thes
Wiz
CVE-2026-5891 Impact, Exploitability, and Mitigation Steps | Wiz
blogs_wiz·CVSS 8.8
CVE-2026-5891 [HIGH] CVE-2026-5891 Impact, Exploitability, and Mitigation Steps | Wiz
## CVE-2026-5891 :
Google Chrome vulnerability analysis and mitigation
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)
Source : NVD
Published April 8, 2026
CNA Score N/A
Affected Technologies
Google Chrome
Chromium
Has Public Exploit No
Has CISA KEV Exploit No
CISA KEV Release Date N/A
CISA KEV Due Date N/A
Exploitation Probability Percentile (EPSS) 9.4
Exploitation Probability (EPSS) N/A
Affected packages and libraries
cpe:2.3:a:google:chrome
chromium
Sources
NVD
Debian 11, 12, 13, 14 No Fix Added at: Apr 09, 2026
Echo No Fix Added at: Apr 09, 2026
Linux Has Fix Added at: Apr 09,
Bugzilla
CVE-2026-5891 chromium-browser: Insufficient policy enforcement in browser UI
bugzilla·2026-04-08·CVSS 4.3
CVE-2026-5891 [MEDIUM] CVE-2026-5891 chromium-browser: Insufficient policy enforcement in browser UI
CVE-2026-5891 chromium-browser: Insufficient policy enforcement in browser UI
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)
2026-04-08
Published