Vulnerability in Google Chrome
CVE-2026-91748
Race condition in Extensions in Google Chrome on on Mac prior to 153.0.8010.47 allowed a remote attacker who had compromised the renderer process and leveraged social engineering to potentially execute arbitrary code outside the sandbox via UI Interaction. (Chromium security severity: High)
Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.3 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (13.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 13.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · 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/521559611 (Permissions Required)
Frequently asked questions
- What is CVE-2026-91748?
- CVE-2026-91748 is a high-severity vulnerability in Google Chrome, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 8.3/10. Published 2026-09-15.
- How severe is CVE-2026-91748?
- High severity. CVSS v3 base score is 8.3 out of 10.