# github.com/go-acme/lego/v4 (Go) vulnerabilities

2 known vulnerabilities (1 high, 1 low), with the versions each affects and the releases that fix them.

## At a glance

- Latest release: v4.35.2 (Apr 24, 2026): no advisory affects it
- Newest unaffected release: v4.35.2 (Apr 24, 2026), the latest release
- Releases: 75 since v4.0.0 (Sep 2, 2020)
- Registry: https://pkg.go.dev/github.com/go-acme/lego/v4
- Releases read: Nov 8, 2026

## Version timeline

Affected versions per advisory, in version order:

- CVE-2026-40611: v4.0.0 to v4.33.0 (v4.34.0 is outside it)
- CVE-2025-54799: v4.0.0 to v4.25.1 (v4.25.2 is outside it)

## Advisories (2)

### [CVE-2026-40611](https://cve.now/CVE-2026-40611): Lego: Arbitrary File Write via Path Traversal in Webroot HTTP-01 Provider

- Severity: High 8.8
- Published: Apr 21, 2026
- Affected: fixed in 4.34.0.
- Fixed in v4.34.0 (released Apr 15, 2026, 6 days before disclosure).
- The latest release, v4.35.2, is not affected.

### [CVE-2025-54799](https://cve.now/CVE-2025-54799): Lego does not enforce HTTPS

- Severity: Low 2.3
- Published: Aug 7, 2025
- Affected: fixed in 4.25.2.
- Fixed in v4.25.2 (released Aug 6, 2025, 1 day before disclosure).
- The latest release, v4.35.2, is not affected.

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