What is CVE-2025-10966?

CVE-2025-10966 is a medium-severity vulnerability in Curl, classified under 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.

Published 2025-11-07 · last modified 2026-09-15.

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.

EPSS exploit prediction

EPSS: 0.004 (31.5th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 31st percentile — 31.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Curl — versions 8.16.0, 8.15.0, 8.14.1
Haxx Curl

Weakness classification (CWE)

CWE-322 — Key Exchange without Entity Authentication

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 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.