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VulnerabilityPublished Updated

CVE-2026-87606: Google Chrome · Missing Authorization

Affects Google ChromeSource CVE Database V5

0

Not known to be exploited · CVSS 8.1 High : upgrade to 153.0.8010.36 soon.

Data as of 26 Oct 2026, 10:12 UTC

CVSS 3.1 base score
8.1High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.3% chance of exploitation in 30 days – higher than 24% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CISA SSVC
Exploitation
No evidence of active exploitation and no public proof of concept
Automatable
Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact
Total control over the software or total information disclosure

CISA SSVC assessment, 2026-09-10.

Patch
Available – fixed in 153.0.8010.36
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 9 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Upgrade Google Chrome to 153.0.8010.36.

Affected software

ProductAffectedFixed in
GoogleChromeAffected
  • >=153.0.8010.36 <153.0.8010.36
Fixed in
  • 153.0.8010.36

AI-suggested

Users should update Google Chrome to version 153.0.8010.36 or later to apply the official fix. No additional mitigation is required as the vulnerability is addressed by this update.

Description

CVE-2026-87606 is a vulnerability in Google Chrome's SiteIsolation feature prior to version 153.0.8010.36. It involves missing authorization that allows a remote attacker who has compromised the renderer process to bypass site isolation using a crafted HTML page. The issue has been fixed in Chrome version 153.0.8010.36.

References

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