Vulnerability · Published May 20, 2026 · Assigned by Chrome
CVE-2026-9123
High 7.5
In plain English
A high-severity heap buffer overflow 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 0.2% (higher than 8% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.2%top 91.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Heap buffer overflow in Chromecast in Google Chrome on Android, Linux, ChromeOS prior to 148.0.7778.179 allowed a local attacker to execute arbitrary code inside a sandbox via malicious network traffic. (Chromium security severity: Medium)
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | chromium | 148.0.7778.178-1~deb12u1 | DEBIAN-CVE-2026-9123 |
| Debian:13 | chromium | 148.0.7778.178-1~deb13u1 | DEBIAN-CVE-2026-9123 |
| Debian:14 | chromium | 148.0.7778.178-1 | DEBIAN-CVE-2026-9123 |
Affected products (as reported)
Weakness: CWE-122 · Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H