What is CVE-2025-11563?

CVE-2025-11563 is a medium-severity vulnerability in Curl, classified under Path Traversal. CVSS score: 4.6/10. Published 2026-02-25.

How severe is CVE-2025-11563?

Medium severity. CVSS v3 base score is 4.6 out of 10.

Path Traversal in Curl

CVE-2025-11563

URLs containing percent-encoded slashes (`/` or `\`) can trick wcurl into saving the output file outside of the current directory without the user explicitly asking for it. This flaw only affects the wcurl command line tool.

Vulnerability class: Path Traversal (Directory Traversal)

EPSS: 0.003 (22.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.6 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N.

Affected products

Curl — versions 8.17.0, 8.16.0, 8.15.0
Curl Wcurl
Haxx Curl

Weakness classification (CWE)

CWE-22 — Path Traversal

References

2499f714-1537-4658-8207-48ae4bb9eae9 (Vendor Advisory)
2499f714-1537-4658-8207-48ae4bb9eae9 (Patch, Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (Mailing List, Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2025-11563?: CVE-2025-11563 is a medium-severity vulnerability in Curl, classified under Path Traversal. CVSS score: 4.6/10. Published 2026-02-25.
How severe is CVE-2025-11563?: Medium severity. CVSS v3 base score is 4.6 out of 10.