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 Details
- CVSS 3.1 Base Score: 7.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade curl | Sep 7, 2026 | Sep 6, 2026 |
| Amazon_linux_2023 | — | Upgrade curl-debuginfoUpgrade curl-debugsourceUpgrade libcurl-minimalUpgrade libcurl-debuginfoUpgrade curl-minimal-debuginfoUpgrade libcurl-develUpgrade curl-minimalUpgrade libcurlUpgrade curlUpgrade libcurl-minimal-debuginfo | Sep 30, 2026 | Sep 6, 2026 |
| Redhat_linux | — | No solution exists | Sep 23, 2026 | Sep 6, 2026 |
| Ubuntu | — | Upgrade libcurl3-gnutls (Ubuntu Pro)Upgrade libcurl4-openssl-dev (Ubuntu Pro)Upgrade libcurl3 (Ubuntu Pro)Upgrade libcurl3-nss (Ubuntu Pro)Upgrade libcurl3-gnutlsUpgrade curl (Ubuntu Pro)Upgrade libcurl3t64-gnutlsUpgrade libcurl4-openssl-devUpgrade libcurl4-gnutls-dev (Ubuntu Pro)Upgrade curlUpgrade libcurl4 (Ubuntu Pro)Upgrade libcurl4-nss-dev (Ubuntu Pro)Upgrade libcurl3-nssUpgrade libcurl4-gnutls-devUpgrade libcurl4t64Upgrade libcurl4-nss-devUpgrade libcurl4 | Sep 27, 2026 | Sep 24, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Sep 24, 2026 | Sep 6, 2026 |
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