CVE-2026-9959

chromium-browser: Race in WebRTC

Published May 28, 2026 CVSS 3.1 · 3.1 Low EPSS < 1% KEV · Not listed
Description
Race in WebRTC in Google Chrome on Windows prior to 148.0.7778.216 allowed a remote attacker to leak cross-origin data 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-6316-1 chromium security update
History
Type Values Removed Values Added
First Time appeared Microsoft
Microsoft windows
CPEs cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft windows
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N'}

ssvc

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

cvssV3_1

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

Type Values Removed Values Added
Title Race Condition in WebRTC Exposes Cross‑Origin Data chromium-browser: Race in WebRTC
Weaknesses CWE-366
References
Metrics threat_severity

None

cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N'}

threat_severity

Important

Type Values Removed Values Added
First Time appeared Google
Google chrome
Vendors & Products Google
Google chrome
Type Values Removed Values Added
Title Race Condition in WebRTC Exposes Cross‑Origin Data
Type Values Removed Values Added
Description Race in WebRTC in Google Chrome on Windows prior to 148.0.7778.216 allowed a remote attacker to leak cross-origin data via a crafted HTML page. (Chromium security severity: High)
Weaknesses CWE-362
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
Chrome
Published
Updated
May 29, 2026, 4:31 PM
Reserved
May 28, 2026, 5:25 PM
Status
Analyzed
Published
May 28, 2026, 11:16 PM
Modified
Jul 21, 2026, 11:10 AM
Severity
Important
Public date
May 27, 2026, 12:00 AM