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CVE-2025-13034

5.9 · MEDIUM

When using `CURLOPT_PINNEDPUBLICKEY` option with libcurl or `--pinnedpubkey` with the curl tool,curl should check the public key of the server certificate to verify the peer.

Published Jan 8, 2026CWE-295EPSS 0.24%

Overview

CVE-2025-13034 is a medium-severity vulnerability. It was published on January 8, 2026 and has a CVSS 3.1 base score of 5.9 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

When using `CURLOPT_PINNEDPUBLICKEY` option with libcurl or `--pinnedpubkey`

with the curl tool,curl should check the public key of the server certificate

to verify the peer.

This check was skipped in a certain condition that would then make curl allow

the connection without performing the proper check, thus not noticing a

possible impostor. To skip this check, the connection had to be done with QUIC

with ngtcp2 built to use GnuTLS and the user had to explicitly disable the

standard certificate verification.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refcurl.se/docs/CVE-2025-13034.htmlRefcurl.se/docs/CVE-2025-13034.json

How CyberStrike helps

Frequently asked questions

What is CVE-2025-13034?

CVE-2025-13034 is a medium-severity vulnerability. It was published on January 8, 2026 and has a CVSS 3.1 base score of 5.9 (MEDIUM).

How severe is CVE-2025-13034?

This vulnerability has a CVSS 3.1 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2025-13034?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2025-13034?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-13034 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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