Description
A flaw was found in curl. When importing HTTP Strict Transport Security (HSTS) cache records, loading a parent domain entry configured to include subdomains before a longer-lived subdomain entry silently drops the subdomain policy. Consequently, once the parent policy expires, curl fails to upgrade subsequent connections for the subdomain to HTTPS and transmits unencrypted requests, allowing a network attacker to intercept sensitive data.
Published: n/a
Score: 3.7 Low
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Ubuntu USN Ubuntu USN USN-8927-1 curl vulnerabilities
Ubuntu USN Ubuntu USN USN-8932-1 curl vulnerabilities
History

Sat, 17 Oct 2026 00:30:00 +0000

Type Values Removed Values Added
Description A flaw was found in curl. When importing HTTP Strict Transport Security (HSTS) cache records, loading a parent domain entry configured to include subdomains before a longer-lived subdomain entry silently drops the subdomain policy. Consequently, once the parent policy expires, curl fails to upgrade subsequent connections for the subdomain to HTTPS and transmits unencrypted requests, allowing a network attacker to intercept sensitive data.
Title curl: curl: HSTS cache import drops longer-lived child
Weaknesses CWE-201
References
Metrics threat_severity

None

 cvssV3_1

{'score': 3.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N'}

threat_severity

Low

Subscriptions

No data.

cve-icon MITRE

No data.

cve-icon Vulnrichment

No data.

cve-icon NVD

No data.

cve-icon Redhat

Severity : Low

Publid Date: 2026-10-14T12:00:00Z

Links: CVE-2026-87862 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-10-17T02:00:07Z

Weaknesses
  • CWE-201

    Insertion of Sensitive Information Into Sent Data