Auth bypass in Curl
CVE-2025-15224
When doing SSH-based transfers using either SCP or SFTP, and asked to do public key authentication, curl would wrongly still ask and authenticate using a locally running SSH agent.
Vulnerability class: Broken Authentication
EPSS: 0.004 (33.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 3.1 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N.
Affected products
Weakness classification (CWE)
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)
Frequently asked questions
- What is CVE-2025-15224?
- CVE-2025-15224 is a low-severity vulnerability in Curl, classified under Improper Authentication. CVSS score: 3.1/10. Published 2026-01-08.
- How severe is CVE-2025-15224?
- Low severity. CVSS v3 base score is 3.1 out of 10.