CVE-2026-9959

Name: CVE-2026-9959
Creator: NVD / NIST
Published: 2026-05-28T23:16:54.1+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 3.1/10EPSS 0.14%

Last modified Jun 17, 2026

CVE-2026-9959 is a low-severity vulnerability rated 3.1/10 on the CVSS scale. 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). EPSS estimates a 0.14% chance of exploitation in the next 30 days.

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)

Metrics

CVSS 3.1

3.1/10

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

EPSS Probability

0.14%

3.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-362

Affected Software

Vendor	Product	Versions
Google	Chrome	< 148.0.7778.216

References

https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.htmlRelease Notes
https://issues.chromium.org/issues/504557432Permissions Required

Timeline

Published: May 28, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-9959?

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)

How severe is CVE-2026-9959?

CVE-2026-9959 has a CVSS score of 3.1/10 (LOW severity). The EPSS model estimates a 0.14% probability of exploitation in the next 30 days.

How do I fix CVE-2026-9959?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-9959?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST