CVE-2026-9959

FAUCET Score

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)

First published: May 28, 2026Last modified: May 28, 2026

Impacted Technologies

Vendor	Product	Version(s)	CPE
		< 148.0.7778.216CPE matchmatch criteria	cpe:2.3:a:google:chrome::::::::
		>= 148.0.7778.216, < 148.0.7778.216CPE match	cpe:2.3:a:google:chrome::::::::

CVSS Data

CVSS version used by this source: 3.1

3.1LOW

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

NONE

Exploitability Score

1.6

Impact Score

1.4

CvssVersion

3.1

Exploit Intelligence

EPSS Score

0.14%

Probability of exploitation in next 30 days

EPSS Percentile

3.6%

Percentile rank of EPSS score among Peer Group

As of 2026-07-27

Model: v2026.06.15

This CVE's current EPSS score of 0.0014 is in the 3rd percentile among its peer group of 233 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.2 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.1 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

microsoftpatch availablevia msrc

Product: Microsoft Edge (Chromium-based)Fixed in: 148.0.3967.96

Vendor Advisories (1)

microsoft2026-May/CVE-2026-9959

Chromium: CVE-2026-9959 Race in WebRTC

May 12, 2026

References

chromereleases.googleblog.com / 2026/05/stable-channel-update-for-desktop_0877304591.html

Release Notes

issues.chromium.org / issues/504557432

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