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CVE-2025-22870

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

Published: Mar 12, 2025Updated: Apr 16, 2026 Sources: CVE List NVD GHSA BDUCWE-115
NVD MITRE
4.4CVSSMEDIUM
EPSS Score
0.4%
Top 73.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:LAC:LPR:LUI:NS:UC:LI:NA:L
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:NIntegrity
None
A:LAvailability
Low
Open in CVSS calculator →

Weaknesses

CWE-115

Affected Products

net/httpGo standard library
LibraryLibrary
OSS Libraries / generic-library
golang.org/x/net/http/httpproxygolang.org/x/net
Library
OSS Libraries / go
golang.org/x/net/proxygolang.org/x/net
Library
OSS Libraries / go
РЕД ОСООО «Ред Софт»
On-premOS
Operating Systems / linux-distro
АЛЬТ СП 10АО «ИВК»
On-premOS
Operating Systems / linux-distro
go standard libraryoss-projectUSOSS Librariesaka golang standard library, net/http, crypto/x509, html/template
golang.org/x/netoss-projectOSS Librariesaka golang.org/x/net
ооо «ред софт»commercialRUOperating Systemsaka red soft
ао «ивк»commercialRUOperating Systemsaka ivk
and 3 more affected products View all →

Exploitability

Official Patch Available

References

https://go.dev/cl/654697
go.dev
https://go.dev/issue/71984
go.dev
https://groups.google.com/g/golang-announce/c/4t3lzH3I0eI/m/b42ImqrBAQAJ
groups.google.com
and 13 more references View all →

Timeline

Published
Mar 12, 2025
Last Updated
Apr 16, 2026

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