Home/CVE/Incorrect security UI in Fullscreen in Google Chrome prior to 148.0.7778.168 allowed a remote attacker to perform UI spo
CVE

CVE-2026-8561

Incorrect security UI in Fullscreen in Google Chrome prior to 148.0.7778.168 allowed a remote attacker to perform UI spo

Incorrect security UI in Fullscreen in Google Chrome prior to 148.0.7778.168 allowed a remote attacker to perform UI spoofing via a crafted HTML page. (Chromium security severity: Medium)

MEDIUM · CVSS 5.4 EPSS 0.00061
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules15 YARA rules0
⬡

Weakness Classification

CWE-451User Interface (UI) Misrepresentation of Critical Information
▤

Affected Products & Versions

1
google chrome< 148.0.7778.168
◈

Sigma Hunt Rules

15
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
producthighSuspicious Microsoft Office Child Process - MacOS
producthighRemote Access Tool - Renamed MeshAgent Execution - MacOS
producthighBinary Padding - MacOS
productmediumSuspicious Execution via macOS Script Editor
productmediumSystem Information Discovery Via Sysctl - MacOS
productmediumNew File Exclusion Added To Time Machine Via Tmutil - MacOS
▣

Scoring & Timeline

5.4
MEDIUM · CVSS v3.1 · chrome-cve-admin@google.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD14 May 2026 · 08:17 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

3
suse-csafopenSUSE-SU-2026:10786-1
msrcCVE-2026-8561
chrome-releasesCHROME-tag:blogger.com,
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_12.htmlProductVendor Advisory
https://issues.chromium.org/issues/343352552Permissions Required
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