CVE-2026-78954: High Incorrect authorization in Extensions
Chromium: CVE-2026-78954 Incorrect authorization in Extensions
Other sources
Incorrect authorization in Extensions in Google Chrome prior to 152.0.7977.65 allowed a remote attacker who had compromised the renderer process to bypass web origin policy via a crafted HTML page. (Chromium security severity: High)
— MITRE
This CVE was assigned by Chrome. Microsoft Edge (Chromium-based) ingests Chromium, which addresses this vulnerability. Please see Google Chrome Releases for more information.
— Microsoft
Credit
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 152.0.4191.53 - Upgrade
Upgrade
Google Chrome / Edge (Chromium-based)to a version that resolves this vulnerability.Fixed in 152.0.7977.65
Event History
Peer vulnerabilities
Found alongside the following vulnerabilities.
Frequently Asked Questions
What level of access does an attacker need to exploit this issue?
The attacker must first compromise the Chrome renderer process. Exploitation then involves a crafted HTML page to bypass the web origin policy.
Which Chrome versions should be remediated?
Google Chrome versions prior to 152.0.7977.65 are affected. Update to 152.0.7977.65 or a later version.