CVE-2025-5025 Information

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.

Reference

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