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THREAT OPS › Threat News › [NVD] CVE-2026-27145 (MEDIUM 6.5) — (*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 quadratic

[NVD] CVE-2026-27145 (MEDIUM 6.5) — (*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 quadratic

lownvdPublished 2026-06-02

CVE-2026-27145 CVSS: 6.5 MEDIUM Published: 2026-06-02T23:16:35.570

(*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 b

Indicators of compromise

CVE-2026-27145cve

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-27145