Insufficient validation of untrusted input in OptimizationGuide in Google Chrome prior to 148.0.7778.216 allowed a remote attacker who had compromised the renderer process to perform UI spoofing via a crafted HTML page. (Chromium security severity: High)

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Fixes

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History

Fri, 29 May 2026 20:30:00 +0000

Type Values Removed Values Added
First Time appeared Apple
Apple macos
Linux
Linux linux Kernel
Microsoft
Microsoft windows
Weaknesses NVD-CWE-noinfo
CPEs cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*
Vendors & Products Apple
Apple macos
Linux
Linux linux Kernel
Microsoft
Microsoft windows

Fri, 29 May 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 5.7, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

cvssV3_1

{'score': 4.2, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:L'}


Fri, 29 May 2026 12:15:00 +0000

Type Values Removed Values Added
Title Insufficient Validation in OptimizationGuide Enables UI Spoofing chromium-browser: Insufficient validation of untrusted input in OptimizationGuide
Weaknesses CWE-1289
References
Metrics threat_severity

None

cvssV3_1

{'score': 5.7, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N'}

threat_severity

Important


Fri, 29 May 2026 02:30:00 +0000

Type Values Removed Values Added
First Time appeared Google
Google chrome
Vendors & Products Google
Google chrome

Fri, 29 May 2026 01:00:00 +0000

Type Values Removed Values Added
Title Insufficient Validation in OptimizationGuide Enables UI Spoofing

Thu, 28 May 2026 22:45:00 +0000

Type Values Removed Values Added
Description Insufficient validation of untrusted input in OptimizationGuide in Google Chrome prior to 148.0.7778.216 allowed a remote attacker who had compromised the renderer process to perform UI spoofing via a crafted HTML page. (Chromium security severity: High)
Weaknesses CWE-20
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Chrome

Published:

Updated: 2026-05-29T16:32:48.868Z

Reserved: 2026-05-28T17:25:08.137Z

Link: CVE-2026-9986

cve-icon Vulnrichment

Updated: 2026-05-29T16:32:31.967Z

cve-icon NVD

Status : Analyzed

Published: 2026-05-28T23:16:56.840

Modified: 2026-05-29T20:27:43.160

Link: CVE-2026-9986

cve-icon Redhat

Severity : Important

Publid Date: 2026-05-27T00:00:00Z

Links: CVE-2026-9986 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-05-29T22:00:09Z