Vulnerability · Published May 28, 2026 · Assigned by Chrome
CVE-2026-9940
High 8.8
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 0.3% (higher than 20% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.3%top 80.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Heap buffer overflow in ANGLE in Google Chrome prior to 148.0.7778.216 allowed a remote attacker to potentially exploit heap corruption 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-2026-9940 |
| Debian:13 | chromium | 148.0.7778.215-1~deb13u1 | DEBIAN-CVE-2026-9940 |
| Debian:14 | chromium | 148.0.7778.215-1 | DEBIAN-CVE-2026-9940 |
| Debian:12 | webkit2gtk | no fix listed | DEBIAN-CVE-2026-9940 |
| Debian:13 | webkit2gtk | 2.54.0-1~deb13u1 | DEBIAN-CVE-2026-9940 |
| Debian:14 | webkit2gtk | no fix listed | DEBIAN-CVE-2026-9940 |
| Debian:12 | wpewebkit | no fix listed | DEBIAN-CVE-2026-9940 |
| Debian:13 | wpewebkit | no fix listed | DEBIAN-CVE-2026-9940 |
| Debian:14 | wpewebkit | 2.54.0-1 | DEBIAN-CVE-2026-9940 |
Affected products (as reported)
Weakness: CWE-122 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H