Privilege escalation in Google Chrome
CVE-2026-78999
Improper privilege management in Navigation in Google Chrome prior to 152.0.7977.65 allowed a remote attacker who had compromised the renderer process and leveraged social engineering to potentially execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Medium)
Vulnerability class: Privilege Escalation
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: 0.004 (31.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 31st percentile — 31.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.004 · change: -0.001
Affected products
Weakness classification (CWE)
References
- chromereleases.googleblog.com/2026/08/stable-channel-update-for-desktop_0256176… (Release Notes, Vendor Advisory)
- issues.chromium.org/issues/497957278 (Permissions Required)
Frequently asked questions
- What is CVE-2026-78999?
- CVE-2026-78999 is a high-severity vulnerability in Google Chrome, classified under Improper Privilege Management. CVSS score: 8.3/10. Published 2026-08-25.
- How severe is CVE-2026-78999?
- High severity. CVSS v3 base score is 8.3 out of 10.