Insufficient policy enforcement in Service Worker in Google Chrome on prior to 148.0.7778.179 allowed a remote attacker to bypass same origin policy via a crafted HTML page. (Chromium security severity: High)
CVE-2026-9115
MEDIUMNVD 4.34.3—
EchelonGraph scoreHIGH confidence
Score 4.3 from GitHub Security Advisory published 2026-05-20. NVD baseline CVSS 4.3; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: ghsa, nvd
4.3
- CVSS v3
- 4.3
- EG Score
- 4.3(high)
- EPSS
- 7.4%
- 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/495999481
Frequently asked(5)
What is CVE-2026-9115?
CVE-2026-9115 is a medium vulnerability published on May 20, 2026. Insufficient policy enforcement in Service Worker in Google Chrome on prior to 148.0.7778.179 allowed a remote attacker to bypass same origin policy via a crafted HTML page. (Chromium security severity: High)
When was CVE-2026-9115 disclosed?
CVE-2026-9115 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-2026-9115 actively exploited?
CVE-2026-9115 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 7.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-9115?
CVE-2026-9115 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-9115?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-9115, 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.
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-9115
Is Your Infrastructure Affected by CVE-2026-9115?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.