QUIC certificate check skip with wolfSSL
libcurl accidentally skips the certificate verification for QUIC connections when connecting to a host specified as an IP address in the URL. Therefore, it does not detect impostors or man-in-the-middle attacks.
02 / AFFECTED SOFTWARE
Affected packages
10 explicit affected versions
20 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
libcurl accidentally skips the certificate verification for QUIC connections when connecting to a host specified as an IP address in the URL. Therefore, it does not detect impostors or man-in-the-middle attacks.
libcurl accidentally skips the certificate verification for QUIC connections when connecting to a host specified as an IP address in the URL. Therefore, it does not detect impostors or man-in-the-middle attacks.
05 / REFERENCES
Further evidence
- http://www.openwall.com/lists/oss-security/2025/05/28/4
- https://curl.se/docs/CVE-2025-4947.html
- https://curl.se/docs/CVE-2025-4947.json
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/4xxx/CVE-2025-4947.json
- https://hackerone.com/reports/3150884
- https://nvd.nist.gov/vuln/detail/CVE-2025-4947