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• Medium 6.8
  CVE-2026-111943 Public exploit

  Distrust compromised intermediate certificates in crypto/x509

  On most platforms, Go uses the given system root certificates. However, in some narrower cases, the system trust stores may not be updated without further action. To defend against the narrower set of cases that may remain affected, a denylist was added in cr…

  Go standard library crypto/x509 renovate golang Debian Ubuntu Azure Linux Alpine Wolfi Go crates.io
  Oct 21, 2026
• Medium 6.5
  CVE-2026-27145 Public exploit

  Inefficient candidate hostname parsing in crypto/x509

  (*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 c…

  Go standard library crypto/x509 golang stdlib Debian Ubuntu Azure Linux Wolfi Go
  Jun 2, 2026
• Medium 4.4
  CVE-2025-22870 Public exploit

  HTTP Proxy bypass using IPv6 Zone IDs in golang.org/x/net

  Matching of hosts against proxy patterns can improperly treat an IPv6 zone ID as a hostname component. For example, when the NO_PROXY environment variable is set to "*.example.com", a request to "[::1%25.example.com]:80` will incorrectly match and not be prox…

  Go standard library golang.org/x/net net/http golang.org/x/net/proxy Debian Ubuntu Azure Linux Alpine Wolfi Go
  Mar 12, 2025