CVE intelligence

CVE-2026-3784

Vulnerability intelligence

Published Mar 11, 2026Sources checked Oct 3, 2026

6.5MEDIUMCVSS out of 10

What this means

Review the available evidence

CVE-2026-3784 and is rated Medium severity with a CVSS score of 6.5. 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

Microsoft Security Response Center guidance

CBL-Mariner Releases Release Notes

Vendor-listed releases

8.11.1-6
8.8.0-9

CISA KEVNot listedBased on the latest collected catalog

EPSS0.5%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-3784?

curl would wrongly reuse an existing HTTP proxy connection doing CONNECT to a server, even if the new request uses different credentials for the HTTP proxy. The proper behavior is to create or use a separate connection.