When `CURLOPT_PINNEDPUBLICKEY` is configured alongside options that disable standard peer verification (`CURLOPT_SSL_VERIFYPEER = 0` and `CURLOPT_SSL_VERIFYHOST = 0`), libcurl fails to enforce public key pinning on connections established without a presented server certificate. Bypassing the pinning check under these disabled-verification conditions allows unauthenticated connections to succeed when they should be rejected.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation poc

Automatable yes

Technical Impact partial

Affected Vendors & Products

Vendors Products
Curl
  • Curl

No data.

No data.

References
Link Providers
https://curl.se/docs/CVE-2026-80230.html cve-icon cve-icon
https://curl.se/docs/CVE-2026-80230.json cve-icon cve-icon
https://hackerone.com/reports/3969300 cve-icon cve-icon cve-icon
History

Tue, 08 Sep 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Sun, 06 Sep 2026 21:15:00 +0000

Type Values Removed Values Added
First Time appeared Curl
Curl curl
Vendors & Products Curl
Curl curl

Sun, 06 Sep 2026 19:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-295

Sun, 06 Sep 2026 18:00:00 +0000

Type Values Removed Values Added
Description When `CURLOPT_PINNEDPUBLICKEY` is configured alongside options that disable standard peer verification (`CURLOPT_SSL_VERIFYPEER = 0` and `CURLOPT_SSL_VERIFYHOST = 0`), libcurl fails to enforce public key pinning on connections established without a presented server certificate. Bypassing the pinning check under these disabled-verification conditions allows unauthenticated connections to succeed when they should be rejected.
Title OpenSSL pinning bypass
References
cve-icon MITRE

Status: PUBLISHED

Assigner: curl

Published: 2026-09-06T17:48:16.262Z

Updated: 2026-09-08T18:53:26.975Z

Reserved: 2026-08-26T04:24:25.568Z

Link: CVE-2026-80230

cve-icon Vulnrichment

Updated: 2026-09-08T18:53:14.829Z

cve-icon NVD

Status : Undergoing Analysis

Published: 2026-09-06T18:17:22.327

Modified: 2026-09-08T19:19:54.063

Link: CVE-2026-80230

cve-icon Redhat

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