Vulnerability · Published May 28, 2026 · Assigned by Chrome
CVE-2026-9959
Low 3.1
In plain English
A low-severity race condition in Chrome from Google. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 3% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)3.1Low
Exploit odds (30 days)0.1%top 96.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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)
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | chromium | 148.0.7778.215-1~deb12u1 | DEBIAN-CVE-2026-9959 |
| Debian:13 | chromium | 148.0.7778.215-1~deb13u1 | DEBIAN-CVE-2026-9959 |
| Debian:14 | chromium | 148.0.7778.215-1 | DEBIAN-CVE-2026-9959 |
Affected products (as reported)
Weakness: CWE-362 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N