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CVE-2026-87608VulnerabilityPublished 09/09/2026Updated 09/14/2026

CVE-2026-87608: Improper certificate validation in Google Chrome

Affects Google ChromeSource GCVE Database

0

Not known to be exploited · CVSS 7.5 High · fixed in 153.0.8010.36 : patch Google Chrome soon.

Data as of 10/25/2026, 04:40:14 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.
Exploitation

Not in CISA KEV, no exploitation reported

EPSS
0.2% chance of exploitation in 30 days – higher than 16% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 153.0.8010.36
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

What to do

Affected software

ProductAffectedFixed in
Google ChromeAffected
  • <153.0.8010.36
  • =153.0.8010.36
Fixed in
  • 153.0.8010.36

AI-suggested

A fix is available in Google Chrome version 153.0.8010.36. Users and administrators should update to this version or later to remediate the vulnerability. No additional mitigation steps are indicated in the provided data.

Description

CVE-2026-87608 is a vulnerability in Google Chrome's FedCM component prior to version 153.0.8010.36. It involves improper certificate validation that allows a remote attacker to bypass the web origin policy through crafted network traffic combined with social engineering. The vulnerability has a high severity rating with a CVSS score of 7.5, indicating a significant confidentiality impact without requiring user interaction or privileges.

Impact

An attacker can bypass the web origin policy, potentially exposing sensitive information protected by this security boundary. The confidentiality of user data may be compromised without affecting integrity or availability. This could lead to unauthorized data disclosure in affected versions of Chrome.

Weaknesses

References

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