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CVE-2026-106421

Google Chrome remote code execution

8.8 HIGHEPSS 0.30%
  1. Published6 Oct 2026

Description

Use after free in PDF in Google Chrome prior to 155.0.8059.39 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: High)

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionRequired
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

Google Chrome< 155.0.8059.39

Remediation

Fixed in
Google Chrome≥ 155.0.8059.39

References

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Frequently asked

Is CVE-2026-106421 being actively exploited?

CVE-2026-106421 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.30%.

How severe is CVE-2026-106421?

CVE-2026-106421 has a CVSS 3.1 base score of 8.8, rated high. EPSS estimates a 0.30% probability of exploitation.

Which products are affected by CVE-2026-106421?

Affected products include Google Chrome.

How do I fix CVE-2026-106421?

Upgrade affected software to a fixed version, for example Google Chrome 155.0.8059.39 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-106421 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.