CVE-2026-12437

EUVD-2026-37522
Use after free in WebShare in Google Chrome on Windows prior to 149.0.7827.155 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Critical)
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
ChromeCNA
8.3 HIGH
NETWORK
HIGH
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 22%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
googlechrome
𝑥
≤ 149.0.7827.155
CNA
Debian logo
Debian Releases
Debian Product
Codename
chromium
bookworm
vulnerable
bookworm (security)
vulnerable
bullseye
vulnerable
bullseye (security)
vulnerable
forky
vulnerable
sid
vulnerable
trixie
vulnerable
trixie (security)
vulnerable
Common Weakness Enumeration
Vulnerability Media Exposure
References
https://chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop_01750511403.html
https://issues.chromium.org/issues/516496659