// For flags

CVE-2025-22870

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

Severity Score

4.4
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track
*SSVC
Descriptions

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.

*Credits: Juho Forsén of Mattermost
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
Low
Attack Vector
Local
Attack Complexity
Low
Authentication
Single
Confidentiality
Partial
Integrity
None
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:Track
Exploitation
None
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2025-01-08 CVE Reserved
  • 2025-03-12 CVE Published
  • 2025-03-18 CVE Updated
  • 2025-03-28 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-115: Misinterpretation of Input
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Golang.org/x/net
Search vendor "Golang.org/x/net"
 Golang.org/x/net/http/httpproxy
Search vendor "Golang.org/x/net" for product "Golang.org/x/net/http/httpproxy"
 < 0.36.0
Search vendor "Golang.org/x/net" for product "Golang.org/x/net/http/httpproxy" and version " < 0.36.0"
en
Affected
Golang.org/x/net
Search vendor "Golang.org/x/net"
 Golang.org/x/net/proxy
Search vendor "Golang.org/x/net" for product "Golang.org/x/net/proxy"
 < 0.36.0
Search vendor "Golang.org/x/net" for product "Golang.org/x/net/proxy" and version " < 0.36.0"
en
Affected