CVE-2025-22870

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

Medium · published March 12, 2025

CVSS v3.1
4.4
EPSS
0%
Percentile
35.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.4 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L
CVSS v4.0
Not supplied
EPSS
0.00425 · 35.7th percentile
Published
2025-03-12T18:27Z
EPSS history
Timeline
  • 12 MAR 18:27Z
    HTTP Proxy bypass using IPv6 Zone IDs in golang.org/x/net
    cvelistv5