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Actively exploited · Published Mar 12, 2026 · Assigned by Chrome

CVE-2026-3909

High 8.8 Exploited

In plain English

A high-severity out-of-bounds write in Chrome from Google. Attackers are actively exploiting it in the wild (listed by CISA on March 13, 2026). The chance it is exploited in the next 30 days is estimated at 2.3% (higher than 84% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.8High
Exploit odds (30 days)2.3%top 16.3% of all CVEs
Exploited in the wildYesCISA KEV since Mar 13, 2026
Attack tooling1Public PoC

CISA guidance

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Federal agencies must remediate by Mar 27, 2026.

Official description

Out of bounds write in Skia in Google Chrome prior to 146.0.7680.75 allowed a remote attacker to perform out of bounds memory access via a crafted HTML page. (Chromium security severity: High)

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Alpine:v3.23qt6-qtwebengine6.10.1-r10ALPINE-CVE-2026-3909
Alpine:v3.24qt6-qtwebengine6.10.2-r8ALPINE-CVE-2026-3909
Debian:12chromium146.0.7680.80-1~deb12u1DSA-6165-1
Debian:12chromium146.0.7680.80-1~deb12u1DEBIAN-CVE-2026-3909
Debian:13chromium146.0.7680.80-1~deb13u1DSA-6165-1
Debian:13chromium146.0.7680.80-1~deb13u1DEBIAN-CVE-2026-3909
Debian:14chromium146.0.7680.80-1DEBIAN-CVE-2026-3909
Debian:12webkit2gtkno fix listedDEBIAN-CVE-2026-3909
Debian:13webkit2gtk2.54.0-1~deb13u1DEBIAN-CVE-2026-3909
Debian:14webkit2gtkno fix listedDEBIAN-CVE-2026-3909
Debian:12wpewebkitno fix listedDEBIAN-CVE-2026-3909
Debian:13wpewebkitno fix listedDEBIAN-CVE-2026-3909
Debian:14wpewebkit2.54.0-1DEBIAN-CVE-2026-3909
Ubuntu:22.04:LTSqtwebkit-opensource-srcno fix listedUBUNTU-CVE-2026-3909
Ubuntu:24.04:LTSqtwebkit-opensource-srcno fix listedUBUNTU-CVE-2026-3909
Ubuntu:22.04:LTSwebkit2gtkno fix listedUBUNTU-CVE-2026-3909
Ubuntu:24.04:LTSwebkit2gtkno fix listedUBUNTU-CVE-2026-3909
Ubuntu:26.04:LTSwebkit2gtkno fix listedUBUNTU-CVE-2026-3909
Ubuntu:26.10webkit2gtkno fix listedUBUNTU-CVE-2026-3909
Ubuntu:22.04:LTSwpewebkitno fix listedUBUNTU-CVE-2026-3909

Affected products (as reported)

VendorProductVersions
Google Chrome 146.0.7680.75 – before 146.0.7680.75

Weakness: CWE-787 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References