Improper Certificate Validation Affecting libcurl package, versions [8.8.0,8.18.0)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-CONAN-LIBCURL-14908855
- published9 Jan 2026
- disclosed8 Jan 2026
- creditStanislav Fort
Introduced: 8 Jan 2026
CVE-2025-13034 (opens in a new tab)How to fix?
Upgrade libcurl to version 8.18.0 or higher.
Overview
Affected versions of this package are vulnerable to Improper Certificate Validation in the CURLOPT_PINNEDPUBLICKEY option or --pinnedpubkey with the curl tool. An attacker can intercept or impersonate a server by exploiting the lack of public key verification when a connection is established over QUIC using ngtcp2 with GnuTLS, and the user has explicitly disabled standard certificate verification.