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stdlib

181 known vulnerabilities.

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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 go stdlib Debian Ubuntu Alpine Go crates.io
  • 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 stdlib golang-1.19 Debian Ubuntu Go
  • 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 Alpine Go
  • Medium 5.3
    CVE-2022-41717 Public exploit

    Excessive memory growth in net/http and golang.org/x/net/http2

    An attacker can cause excessive memory growth in a Go server accepting HTTP/2 requests. HTTP/2 server connections contain a cache of HTTP header keys sent by the client. While the total number of entries in this cache is capped, an attacker sending very large…

    Go standard library golang.org/x/net net/http golang.org/x/net/http2 Debian Ubuntu Alpine Go
  • Medium 5.9
    CVE-2018-16875 Public exploit

    Denial of service in chain verification in crypto/x509

    The crypto/x509 package of Go before 1.10.6 and 1.11.x before 1.11.3 does not limit the amount of work performed for each chain verification, which might allow attackers to craft pathological inputs leading to a CPU denial of service. Go TLS servers accepting…

    [UNKNOWN] golang stdlib golang-1.8 Ubuntu Go