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)

Published 2026-02-25 · last modified 2026-06-17.

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.

EPSS exploit prediction

EPSS: 0.004 (28.5th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 28.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001

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.