Observable discrepancy in Google Chromium - CVE-2026-78949
Published: August 26, 2026
Vulnerability identifier: #VU145600
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-78949
CWE-ID: CWE-203
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to an observable discrepancy in CustomTabs when rendering content. A remote attacker can trick the victim into rendering crafted content to disclose sensitive information.
User interaction is required.
Affected software
Google Chromium
Google Chrome
Debian Linux
chromium (Debian package)
Google Chrome
Debian Linux
chromium (Debian package)
How to mitigate CVE-2026-78949
Install security update from vendor's website.
Google Chromium - update to 152.0.7977.64
Google Chrome - addressed in versions 151.0.7922.175, 152.0.7977.64
chromium (Debian package) - update to 152.0.7977.75-1~deb13u1
Google Chrome - addressed in versions 151.0.7922.175, 152.0.7977.64
chromium (Debian package) - update to 152.0.7977.75-1~deb13u1