MEDIUM 4.4 Go
HTTP Proxy bypass using IPv6 Zone IDs in golang.org/x/net
GHSA-qxp5-gwg8-xv66 · CVE-2025-22870 · GO-2025-3503
Published · Modified
Description
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.
References
- ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2025-22870
- PACKAGE https://go-review.googlesource.com/q/project:net
- WEB https://go.dev/cl/654697
- WEB https://go.dev/issue/71984
- WEB https://groups.google.com/g/golang-announce/c/4t3lzH3I0eI/m/b42ImqrBAQAJ
- WEB https://pkg.go.dev/vuln/GO-2025-3503
- WEB https://security.netapp.com/advisory/ntap-20250509-0007
- WEB http://www.openwall.com/lists/oss-security/2025/03/07/2
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