CVE-2026-9115

chromium-browser: Insufficient policy enforcement in Service Worker

Published May 20, 2026 CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
Description
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)

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DSA Debian DSA DSA-6287-1 chromium security update
History
Type Values Removed Values Added
Title chromium-browser: Insufficient policy enforcement in Service Worker
Weaknesses CWE-940
References
Metrics threat_severity

None

threat_severity

Important

Type Values Removed Values Added
First Time appeared Apple
Apple macos
Linux
Linux linux Kernel
Microsoft
Microsoft windows
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
Type Values Removed Values Added
Title Same‑Origin Policy Bypass via Service Worker Policy Enforcement Failure in Google Chrome
Type Values Removed Values Added
Weaknesses CWE-285
Type Values Removed Values Added
First Time appeared Google
Google chrome
Vendors & Products Google
Google chrome
Type Values Removed Values Added
Title Same‑Origin Policy Bypass via Service Worker Policy Enforcement Failure in Google Chrome
Weaknesses CWE-285
Type Values Removed Values Added
Weaknesses CWE-693
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N'}

ssvc

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

Type Values Removed Values Added
Description 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)
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
Chrome
Published
Updated
May 20, 2026, 7:39 PM
Reserved
May 20, 2026, 5:39 PM
Status
Analyzed
Published
May 20, 2026, 8:16 PM
Modified
Jul 23, 2026, 3:10 PM
Severity
Important
Public date
May 19, 2026, 12:00 AM