CVE-2025-4947

6.5 mediumEPSS 0.3%

Medium (6.5) in haxx curl. EPSS 0.3% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

6.5 medium

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

EPSS: 0.3% chance of exploitation in the next 30 days; higher than 22% of CVEs (scores of 2026-10-31)
CWE: CWE-295
Published: 2025-05-28
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

haxx:curl

References

https://curl.se/docs/CVE-2025-4947.html
https://curl.se/docs/CVE-2025-4947.json
https://hackerone.com/reports/3150884
http://www.openwall.com/lists/oss-security/2025/05/28/4

Check your stack JSON