Auth bypass in Google Chrome
CVE-2026-91732
Missing authorization in AppManifest in Google Chrome prior to 153.0.8010.47 allowed a remote attacker who had compromised the renderer process and leveraged social engineering to bypass web origin policy via a crafted HTML page. (Chromium security severity: Medium)
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.003 (18.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 18th percentile — 18.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
Weakness classification (CWE)
References
- chromereleases.googleblog.com/2026/09/stable-channel-update-for-desktop_0541751… (Release Notes, Vendor Advisory)
- issues.chromium.org/issues/511062248 (Exploit, Patch, Issue Tracking)
Frequently asked questions
- What is CVE-2026-91732?
- CVE-2026-91732 is a high-severity vulnerability in Google Chrome, classified under Missing Authorization. CVSS score: 8.1/10. Published 2026-09-15.
- How severe is CVE-2026-91732?
- High severity. CVSS v3 base score is 8.1 out of 10.