CVE intelligence

CVE-2026-8286

Vulnerability intelligence

Published Jul 3, 2026Sources checked Oct 28, 2026

8.1HIGHCVSS out of 10

What this means

Review the available evidence

CVE-2026-8286 and is rated High severity with a CVSS score of 8.1. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.

What to do next

Remediation and response

Ubuntu Security Notices guidance

Vendor revision: Sep 28, 2026

USN-8487-1 fixed vulnerabilities in curl.

Microsoft Security Response Center guidance

Vendor revision: Aug 13, 2026

CBL-Mariner Releases

Vendor-listed releases

8.11.1-10

CISA KEVNot listedBased on the latest collected catalog

EPSS0.3%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-8286?

A vulnerability exists where a new transfer that uses STARTTLS to upgrade the connection might reuse an existing live connection even though the TLS configuration mismatches so it should not.

Source: NVD