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CVE-2026-27145

6.5 Moyenne

Publiée le 03/06/2026 à 01:16 · Modifiée le 18/09/2026 à 15:17 · En attente d'analyse NVD · Source : security@golang.org

Description

(*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.

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Produits concernés

Scores CVSS

VersionScoreSourceVecteur
3.1 6.5 Moyenne 134c704f-9b21-4f2e-91b3-4a467353bcc0 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
3.1 7.5 Élevée 0b0ca135-0b70-47e7-9f44-1890c2a1c46c CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Faiblesses (CWE)

Références

Ailleurs