CVE-2025-22870 — HTTP Proxy bypass using IPv6 Zone IDs in golang.org/x/net

Affected: Go standard library net/http, golang.org/x/net/http/httpproxy, golang.org/x/net/proxy

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 proxied.

USN-7574-1 — golang-1.22 vulnerabilities

Affected: Ubuntu:22.04:LTS: golang-1.22, Ubuntu:24.04:LTS: golang-1.22

Kyle Seely discovered that the Go net/http module did not properly handle sensitive headers during repeated redirects. An attacker could possibly use this issue to obtain sensitive information. (CVE-2024-45336)

Juho Forsén discovered that the Go crypto/x509 module incorrectly handled IPv6 addresses during URI parsing. An attacker could possibly use this issue to bypass certificate URI constraints. (CVE-2024-45341)

It was discovered that the Go crypto module did not properly handle variable time instructions under certain circumstances on 64-bit Power (ppc64el) systems. An attacker could possibly use this issue to expose sensitive information. (CVE-2025-22866)

It was discovered that the Go http/httpproxy module did not properly handle IPv6 zone IDs during hostname matching. An attacker could possibly use this issue to cause a denial of service. (CVE-2025-22870)

Takeshi Kaneko discovered that the Go net/http module did not properly strip sensitive proxy headers during redirect requests. An attacker could possibly use this issue to obtain sensitive information. (CVE-2025-4673)

Most recent entries from all

CVE-2025-22870 — HTTP Proxy bypass using IPv6 Zone IDs in golang.org/x/net

USN-7574-1 — golang-1.22 vulnerabilities