CVE intelligence

CVE-2026-18924

Vulnerability intelligence

Published Sep 6, 2026Sources checked Oct 28, 2026

9.1CRITICALCVSS out of 10

What this means

Review the available evidence

CVE-2026-18924 and is rated Critical severity with a CVSS score of 9.1. 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

Microsoft Security Response Center guidance

Vendor revision: Oct 17, 2026

Release Notes

Vendor-listed releases

8.11.1-12

Ubuntu Security Notices guidance

Vendor revision: Sep 24, 2026

This issue was previously fixed in USN-8487-1, but that fix was incomplete for Ubuntu 16.04 LTS.

CISA KEVNot listedBased on the latest collected catalog

EPSS0.6%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-18924?

A flaw in libcurl's handling of HTTP/2 Server Push streams, when the parent handle is set to share connections with other handles, can lead to use-after-free in the cleanup process.

Source: NVD