Vulnerability · Published Oct 20, 2026 · Assigned by Chrome
CVE-2026-113056
Critical 9.6
In plain English
A critical-severity security flaw 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 29% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)9.6Critical
Exploit odds (30 days)0.3%top 71.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Observable discrepancy in PerformanceAPIs in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to leak cross-origin data via a crafted HTML page. (Chromium security severity: Low)
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | chromium | 156.0.8078.47-1~deb12u1 | DEBIAN-CVE-2026-113056 |
| Debian:13 | chromium | 156.0.8078.47-1~deb13u1 | DEBIAN-CVE-2026-113056 |
| Debian:14 | chromium | 156.0.8078.47-1 | DEBIAN-CVE-2026-113056 |
Affected products (as reported)
Weakness: CWE-203 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H