Medium severity · published Sep 9, 2026
CVE-2026-87577
Incorrect authorization in Isolated in Google Chrome prior to 153.0.8010.36 allowed a remote attacker to bypass web origin policy into a privileged page via a crafted HTML page
4.3
CVSS
0.3%
EPSS
No
On KEV
Description
Incorrect authorization in Isolated in Google Chrome prior to 153.0.8010.36 allowed a remote attacker to bypass web origin policy into a privileged page via a crafted HTML page. (Chromium security severity: Medium)
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 17% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CH
Chrome · Google
153.0.8010.36 before 153.0.8010.36 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-87577
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-87577
Vendor Advisory
https://chromereleases.googleblog.com/2026/09/stable-channel-update-for-desktop_0808145027.html
Exploit
https://issues.chromium.org/issues/501700023
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