CVE-2026-11564

Native CA trust persist

Published Jul 3, 2026 CVSS 3.1 · 9.1 Critical EPSS < 1% KEV · Not listed
Description
libcurl keeps previously used connections in a connection pool for subsequent
transfers to reuse if one of them matches the setup.

An easy handle that first uses default native CA trust can continue trusting
the native platform store after the application switches that same handle to
custom CA material for a later transfer.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Ubuntu USN Ubuntu USN USN-8525-1 curl vulnerabilities
History
Type Values Removed Values Added
First Time appeared Redhat
Redhat hummingbird
Weaknesses CWE-295
CPEs cpe:/a:redhat:hummingbird:1
Vendors & Products Redhat
Redhat hummingbird
References
Metrics threat_severity

None

threat_severity

Moderate

Type Values Removed Values Added
Weaknesses CWE-295
Type Values Removed Values Added
Weaknesses CWE-295
Type Values Removed Values Added
Weaknesses CWE-295
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Weaknesses CWE-295
Type Values Removed Values Added
Weaknesses CWE-295
Type Values Removed Values Added
Weaknesses CWE-295
Type Values Removed Values Added
Weaknesses CWE-295
Type Values Removed Values Added
Weaknesses CWE-295
Type Values Removed Values Added
Weaknesses CWE-295
Type Values Removed Values Added
Weaknesses CWE-295
Type Values Removed Values Added
First Time appeared Curl
Curl curl
Vendors & Products Curl
Curl curl
Type Values Removed Values Added
Description libcurl keeps previously used connections in a connection pool for subsequent transfers to reuse if one of them matches the setup. An easy handle that first uses default native CA trust can continue trusting the native platform store after the application switches that same handle to custom CA material for a later transfer.
Title Native CA trust persist
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
curl
Published
Updated
Sep 15, 2026, 6:02 AM
Reserved
Jun 8, 2026, 8:22 AM
Status
Modified
Published
Jul 3, 2026, 7:16 AM
Modified
Sep 15, 2026, 7:16 AM
Severity
Moderate
Public date
Jul 3, 2026, 6:12 AM