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.

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

Published 2026-01-08 · last modified 2026-09-15.

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.

EPSS exploit prediction

EPSS: 0.005 (39.4th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 39.4% 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: 0.005 · change: +0.001

Affected products

Curl — versions 8.17.0, 8.16.0, 8.15.0
Haxx Curl

Weakness classification (CWE)

CWE-287 — Improper 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)

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.