8.8Hoch
CVE-2026-40611Lego: Arbitrary File Write via Path Traversal in Webroot HTTP-01 Provider
Beschreibung
Let's Encrypt client and ACME library written in Go (Lego). Prior to 4.34.0, the webroot HTTP-01 challenge provider in lego is vulnerable to arbitrary file write and deletion via path traversal. A malicious ACME server can supply a crafted challenge token containing ../ sequences, causing lego to write attacker-influenced content to any path writable by the lego process. This vulnerability is fixed in 4.34.0.
Schwachstellentyp (CWE):
CWE-22
Daten: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Wiedergegeben wie in der Quelle, auf Englisch.
Betroffene Produkte und Versionen
| Hersteller | Produkt | Versionen | |
|---|---|---|---|
| go-acme | lego | < 4.34.0 | |
| openshift devspaces | 3.28 | — | |
| Red Hat | Red Hat OpenShift Dev Spaces 3.28 | all versions |
Referenzen und Patches
- https://github.com/go-acme/lego/security/advisories/GHSA-qqx8-2xmm-jrv8
- https://access.redhat.com/errata/RHSA-2026:21772
- https://access.redhat.com/security/cve/CVE-2026-40611
- https://bugzilla.redhat.com/show_bug.cgi?id=2460233
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-40611.json