CVE-2026-8561

MEDIUMNVD 5.45.4—

5.4

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)

CVSS v3: 5.4
EG Score: 5.4(high)
EPSS: 19.2%
KEV: Not listed

Published

May 14, 2026

Last Modified

May 18, 2026

References (2)

chrome-cve-admin@googlehttps://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_12.html
chrome-cve-admin@googlehttps://issues.chromium.org/issues/343352552

Vendor Advisories for CVE-2026-8561(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

CVE-2026-8561
Microsoft Security Response Center (MSRC)
Chromium: CVE-2026-8561 Incorrect security UI in Fullscreen

Frequently asked(5)

What is CVE-2026-8561?

CVE-2026-8561 is a medium vulnerability published on May 14, 2026. 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)

When was CVE-2026-8561 disclosed?

CVE-2026-8561 was first published in the National Vulnerability Database on May 14, 2026, with the most recent update on May 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2026-8561 actively exploited?

CVE-2026-8561 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 19.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2026-8561?

CVE-2026-8561 has a CVSS v3 base score of 5.4 (NVD).

How do I remediate CVE-2026-8561?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-8561, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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CVE-2026-8561

Published

Last Modified

References (2)

Vendor Advisories for CVE-2026-8561(1)

Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2026-8561?

Same vendor

Same CWE

CVE-2026-8561

📅 Published

🔄 Last Modified

🔗 References (2)

📣 Vendor Advisories for CVE-2026-8561(1)

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2026-8561?

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References (2)

Vendor Advisories for CVE-2026-8561(1)

Frequently asked(5)

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