CVE-2026-80230

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://curl.se/docs/CVE-2026-80230.html	Patch Vendor Advisory
https://curl.se/docs/CVE-2026-80230.json	Vendor Advisory
https://hackerone.com/reports/3969300	Exploit Mitigation Third Party Advisory
https://hackerone.com/reports/3969300	Exploit Mitigation Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-09-06 18:17

Updated : 2026-09-15 07:16

NVD link : CVE-2026-80230

Mitre link : CVE-2026-80230

CVE.ORG link : CVE-2026-80230

JSON object : View

Products Affected

haxx

curl

CWE

CWE-295

Improper Certificate Validation

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