CVE-2026-87570CWE-863broken-access-control

CVE-2026-87570

High · published September 9, 2026

CVSS v3.1
8.8
EPSS
0%
Percentile
22.5
In the wild
Unconfirmed
What it is

Incorrect authorization in SiteIsolation in Google Chrome prior to 153.0.8010.36 allowed a remote attacker who had compromised the renderer process and leveraged social engineering to bypass site isolation via a crafted file. (Chromium security severity: Medium)

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00309 · 22.5th percentile
Weakness
CWE-863 · Incorrect Authorization
Published
2026-09-09T05:17Z
Affected products (1)
ProductVersionsFixed in
google/chrome< 153.0.8010.36153.0.8010.36
References (2)
https://chromereleases.googleblog.com/2026/09/stable-channel-update-for-desktop_0808145027.html · [email protected]https://issues.chromium.org/issues/517215407 · [email protected]
EPSS history
Timeline
  • 11 SEP 03:19Z
    EPSS moved — → 0%
    epss
  • 09 SEP 00:09Z
    Incorrect authorization in SiteIsolation in Google Chrome prior to 153.0.8010.36 allowed a remote attacker who had compromised the renderer process and…
    cvelistv5