CVE-2026-40611
ACME Lego: Arbitrary File Write via Path Traversal in Webroot HTTP-01 Provider
8.8
HIGH
CVSS 3.1
EPSS 0.05%
描述
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.
如何修補 CVE-2026-40611
要修補 CVE-2026-40611,請將受影響套件升級到下列已修補版本。
- —未列出修補版本
- —未列出修補版本
- —未列出修補版本
- —升級至 4.34.0 或更新版本
CVE-2026-40611 正在被利用嗎?
低 — EPSS 為 0.1%,目前沒有觀察到大規模利用活動。
受影響套件(4)
- from 0
- from 0, <= 2.7.2
- from 0, <= 3.9.0
- from 0, < 4.34.0
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |