CVE-2026-9116

MEDIUMNVD 4.34.3—

4.3

Insufficient policy enforcement in ServiceWorker in Google Chrome on prior to 148.0.7778.179 allowed a remote attacker to leak cross-origin data via a crafted HTML page. (Chromium security severity: High)

CVSS v3: 4.3
EG Score: 4.3(high)
EPSS: 9.5%
KEV: Not listed

Published

May 20, 2026

Last Modified

May 21, 2026

References (2)

chrome-cve-admin@googlehttps://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0841193308.html
chrome-cve-admin@googlehttps://issues.chromium.org/issues/497436273

Vendor Advisories for CVE-2026-9116(2)

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

Frequently asked(5)

What is CVE-2026-9116?

CVE-2026-9116 is a medium vulnerability published on May 20, 2026. Insufficient policy enforcement in ServiceWorker in Google Chrome on prior to 148.0.7778.179 allowed a remote attacker to leak cross-origin data via a crafted HTML page. (Chromium security severity: High)

When was CVE-2026-9116 disclosed?

CVE-2026-9116 was first published in the National Vulnerability Database on May 20, 2026, with the most recent update on May 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2026-9116 actively exploited?

CVE-2026-9116 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 9.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2026-9116?

CVE-2026-9116 has a CVSS v3 base score of 4.3 (NVD).

How do I remediate CVE-2026-9116?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-9116, 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-2026-9116

📅 Published

🔄 Last Modified

🔗 References (2)

📣 Vendor Advisories for CVE-2026-9116(2)

❓ Frequently asked(5)