What is CVE-2025-10966?

CVE-2025-10966 is a medium-severity vulnerability in Curl, classified under CWE-322 KEY EXCHANGE WITHOUT ENTITY AUTHENTICATION. CVSS score: 4.3/10. Published 2025-11-07.

How severe is CVE-2025-10966?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in Curl

CVE-2025-10966

curl's code for managing SSH connections when SFTP was done using the wolfSSH powered backend was flawed and missed host verification mechanisms. This prevents curl from detecting MITM attackers and more.

EPSS: 0.004 (31.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

Affected products

Curl — versions 8.16.0, 8.15.0, 8.14.1
Haxx Curl

References

2499f714-1537-4658-8207-48ae4bb9eae9 (Vendor Advisory)
2499f714-1537-4658-8207-48ae4bb9eae9 (Patch, Vendor Advisory)
2499f714-1537-4658-8207-48ae4bb9eae9 (Exploit, Third Party Advisory, Issue Tracking)
af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Patch, Third Party Advisory)
0b142b55-0307-4c5a-b3c9-f314f3fb7c5e

Frequently asked questions

What is CVE-2025-10966?: CVE-2025-10966 is a medium-severity vulnerability in Curl, classified under CWE-322 KEY EXCHANGE WITHOUT ENTITY AUTHENTICATION. CVSS score: 4.3/10. Published 2025-11-07.
How severe is CVE-2025-10966?: Medium severity. CVSS v3 base score is 4.3 out of 10.