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.
Affected products
haxx: curl
References4
- curl.se/docs/CVE-2026-80230.html PatchVendor Advisory
- curl.se/docs/CVE-2026-80230.json Vendor Advisory
- hackerone.com/reports/3969300 ExploitMitigationThird Party Advisory
- hackerone.com/reports/3969300 ExploitMitigationThird Party Advisory
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 31 · as of 3 November 2026
- CWE
- CWE-295
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