CVE intelligence

CVE-2026-87862

Vulnerability intelligence

Published Oct 20, 2026Sources checked Oct 20, 2026

N/ACVSS not listedScore unavailable

What this means

Review the available evidence

CVE-2026-87862. 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: Oct 19, 2026

USN-8927-1 fixed vulnerabilities in curl.

CISA KEVNot listedBased on the latest collected catalog

EPSSUnavailableNo current score collected

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-87862?

Importing a `includeSubDomains` parent HSTS entry before a longer-lived child entry, silently drops the child. Consequently, when the parent expires, the child's valid HSTS policy is lost, causing curl to issue unencrypted HTTP requests rather than upgrading to HTTPS.

Source: NVD