Vulnerability · Published Oct 20, 2026 · Assigned by Chrome
CVE-2026-113261
Critical 9.6
In plain English
A critical-severity improper input validation 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 0.4% (higher than 30% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)9.6Critical
Exploit odds (30 days)0.4%top 70.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Improper input validation in WebAppInstalls in Google Chrome prior to 156.0.8078.47 allowed a remote attacker leveraging social engineering to bypass system access restrictions via a crafted HTML page. (Chromium security severity: Medium)
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | chromium | 156.0.8078.47-1~deb12u1 | DEBIAN-CVE-2026-113261 |
| Debian:13 | chromium | 156.0.8078.47-1~deb13u1 | DEBIAN-CVE-2026-113261 |
| Debian:14 | chromium | 156.0.8078.47-1 | DEBIAN-CVE-2026-113261 |
Affected products (as reported)
Weakness: CWE-20 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H