Heap-based buffer overflow in Google Chromium - CVE-2026-1861

Vulnerability identifier: #VU122263

CSH Severity: High

CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-1861

CWE-ID: CWE-122

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted HTML content in libvpx. A remote attacker can create a specially crafted web page, trick the victim into opening it, trigger a heap-based buffer overflow and execute arbitrary code on the target system.

Google Chromium
Microsoft Edge
Prisma Access Browser
Debian Linux
Fedora
chromium (Debian package)
chromium
cef

Install update from vendor's website.

Google Chromium - update to 144.0.7559.132
Microsoft Edge - update to 144.0.3719.115
chromium (Debian package) - addressed in versions 144.0.7559.109-2~deb12u1, 144.0.7559.109-2~deb13u1
chromium - addressed in versions 144.0.7559.132-1.el9, 144.0.7559.132-1.el10_1, 144.0.7559.132-1.el10_2, 144.0.7559.132-1.fc42, 144.0.7559.132-1.fc43
Prisma Access Browser - update to 144.27.7.133
cef - addressed in versions 145.0.25^chromium145.0.7632.75-4.fc42, 145.0.25^chromium145.0.7632.75-4.fc43, 145.0.25^chromium145.0.7632.75-4.fc44

• https://chromereleases.googleblog.com/2026/02/stable-channel-update-for-desktop.html
• https://crbug.com/478942410

• Multiple vulnerabilities in Google Chrome
• Debian update for chromium
• Multiple vulnerabilities in Microsoft Edge
• Fedora EPEL 10.1 update for chromium
• Fedora EPEL 9 update for chromium
• Fedora EPEL 10.2 update for chromium
• Fedora 43 update for chromium
• Fedora 42 update for chromium
• Multiple vulnerabilities in Prisma Access Browser
• Fedora 43 update for cef
• Fedora 42 update for cef
• Fedora 44 update for cef