CVE-2025-13034

MEDIUM

5.9

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.

CVE Details

CVSS v3.1 Score5.9

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Attack VectorNETWORK

ComplexityHIGH

Privileges RequiredNONE

User InteractionNONE

Published1/8/2026

Last Modified1/20/2026

Sourcenvd

Honeypot Sightings0

Affected Products

haxx:curl

Weaknesses (CWE)

CWE-295

References

https://curl.se/docs/CVE-2025-13034.html(2499f714-1537-4658-8207-48ae4bb9eae9)

https://curl.se/docs/CVE-2025-13034.json(2499f714-1537-4658-8207-48ae4bb9eae9)

IOC Correlations

No correlations recorded

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