CVE-2026-27145
MEDIUM6.5EPSS 0.00%Inefficient candidate hostname parsing in crypto/x509
發布日:2026/6/2修改日:2026/6/2
也稱為:GO-2026-5037
描述
(*x509.Certificate).VerifyHostname previously called matchHostnames in a loop over all DNS Subject Alternative Name (SAN) entries. This caused strings.Split(host, ".") to execute repeatedly on the same input hostname. With a large DNS SAN list, verification costs scaled quadratically based on the number of SAN entries multiplied by the hostname's label count. Because x509.Verify validates hostnames before building the certificate chain, this overhead occurred even for untrusted certificates.
受影響套件(1)
- Go/stdlibfrom 0, < 1.25.11, >= 1.26.0-0, < 1.26.4
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| nvd | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H |