What’s Vulnerable › Vulnerabilities

CVE-2025-5025: No QUIC certificate pinning with wolfSSL

• Severity: medium (CVSS 4.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-05-28 · updated 2026-06-17
• Weakness: CWE-295

Description

libcurl supports *pinning* of the server certificate public key for HTTPS transfers. Due to an omission, this check is not performed when connecting with QUIC for HTTP/3, when the TLS backend is wolfSSL. Documentation says the option works with wolfSSL, failing to specify that it does not for QUIC and HTTP/3. Since pinning makes the transfer succeed if the pin is fine, users could unwittingly connect to an impostor server without noticing.

Affected products

• curl: from 8.5.0 before 8.14.0 — fixed in 8.14.0

How to fix

Upgrade to a fixed version: curl 8.14.0. Check the vendor advisory for mitigations.

References

• https://curl.se/docs/CVE-2025-5025.html
• https://curl.se/docs/CVE-2025-5025.json
• https://hackerone.com/reports/3153497
• http://www.openwall.com/lists/oss-security/2025/05/28/5

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