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.

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.

The EPSS score is 0.00371.

Exploitation poc

Automatable yes

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
curl curl unaffected
Version Status Constraints
7.45.0 affected < 8.14.2
8.15.0 affected < 8.16.1
8.17.0 affected < 8.20.1
8.21.0 affected < 8.22.0
curl curl unaffected
Version Status Constraints
8363656cb4e0c60a11d8531ead0ec43120b50591 affected < 5267ed859d545534d0c21675a2b70af5a3b6e3ef
curl curl unaffected
Version Status Constraints
8.21.0 affected —
8.20.0 affected —
8.19.0 affected —
8.18.0 affected —
8.17.0 affected —
8.16.0 affected —
8.15.0 affected —
8.14.1 affected —
8.14.0 affected —
8.13.0 affected —
8.12.1 affected —
8.12.0 affected —
8.11.1 affected —
8.11.0 affected —
8.10.1 affected —
8.10.0 affected —
8.9.1 affected —
8.9.0 affected —
8.8.0 affected —
8.7.1 affected —
8.7.0 affected —
8.6.0 affected —
8.5.0 affected —
8.4.0 affected —
8.3.0 affected —
8.2.1 affected —
8.2.0 affected —
8.1.2 affected —
8.1.1 affected —
8.1.0 affected —
8.0.1 affected —
8.0.0 affected —
7.88.1 affected —
7.88.0 affected —
7.87.0 affected —
7.86.0 affected —
7.85.0 affected —
7.84.0 affected —
7.83.1 affected —
7.83.0 affected —
7.82.0 affected —
7.81.0 affected —
7.80.0 affected —
7.79.1 affected —
7.79.0 affected —
7.78.0 affected —
7.77.0 affected —
7.76.1 affected —
7.76.0 affected —
7.75.0 affected —
7.74.0 affected —
7.73.0 affected —
7.72.0 affected —
7.71.1 affected —
7.71.0 affected —
7.70.0 affected —
7.69.1 affected —
7.69.0 affected —
7.68.0 affected —
7.67.0 affected —
7.66.0 affected —
7.65.3 affected —
7.65.2 affected —
7.65.1 affected —
7.65.0 affected —
7.64.1 affected —
7.64.0 affected —
7.63.0 affected —
7.62.0 affected —
7.61.1 affected —
7.61.0 affected —
7.60.0 affected —
7.59.0 affected —
7.58.0 affected —
7.57.0 affected —
7.56.1 affected —
7.56.0 affected —
7.55.1 affected —
7.55.0 affected —
7.54.1 affected —
7.54.0 affected —
7.53.1 affected —
7.53.0 affected —
7.52.1 affected —
7.52.0 affected —
7.51.0 affected —
7.50.3 affected —
7.50.2 affected —
7.50.1 affected —
7.50.0 affected —
7.49.1 affected —
7.49.0 affected —
7.48.0 affected —
7.47.1 affected —
7.47.0 affected —
7.46.0 affected —
7.45.0 affected —

Configuration 1 [-]

cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*
Package CPE Advisory Released Date
Red Hat Hardened Images
curl-main-8.22.0-0.1.hum1 cpe:/a:redhat:hummingbird:1 RHSA-2026:63161 2026-09-03T00:00:00Z

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

Vendors Products
Curl Subscribe
Curl Subscribe

Project Subscriptions

Vendors Products
Curl Subscribe
Curl Subscribe
Haxx Subscribe
Curl Subscribe
Redhat Subscribe
Hummingbird Subscribe
Advisories
Source ID Title
Ubuntu USN Ubuntu USN USN-8820-1 curl vulnerabilities
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://curl.se/docs/CVE-2026-80230.html cve-icon cve-icon cve-icon
https://curl.se/docs/CVE-2026-80230.json cve-icon cve-icon cve-icon
https://hackerone.com/reports/3969300 cve-icon cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-80230 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-80230 cve-icon
History

Tue, 22 Sep 2026 00:15:00 +0000

Type Values Removed Values Added
First Time appeared Redhat
Redhat hummingbird
Weaknesses CWE-303
CPEs cpe:/a:redhat:hummingbird:1
Vendors & Products Redhat
Redhat hummingbird
References
Metrics threat_severity

None

 threat_severity

Low

Fri, 11 Sep 2026 23:45:00 +0000

Type Values Removed Values Added
First Time appeared Haxx
Haxx curl
CPEs cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*
Vendors & Products Haxx
Haxx curl

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

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: curl

Published:

Updated: 2026-09-15T06:03:10.429Z

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 : Modified

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

Modified: 2026-09-15T07:16:30.337

Link: CVE-2026-80230

cve-icon Redhat

Severity : Low

Publid Date: 2026-09-06T17:48:16Z

Links: CVE-2026-80230 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-09-22T01:30:17Z

Weaknesses