CVE-2025-22870
HTTP Proxy bypass using IPv6 Zone IDs in golang.org/x/net
4.4
MEDIUM
CVSS 3.1
EPSS 0.02%
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.
How to fix CVE-2025-22870
To remediate CVE-2025-22870, upgrade the affected package to a fixed version below.
- —no fix listed
- —no fix listed
- —upgrade to 1.24.1-1 or later
- —upgrade to 0.36.0 or later
- —upgrade to 0.36.0 or later
- —upgrade to 1.23.7 or later
Is CVE-2025-22870 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (6)
- from 0
- from 0
- from 0, < 1.24.1-1
- from 0, < 0.36.0
- from 0, < 0.36.0
- from 0, < 1.23.7, >= 1.24.0-0, < 1.24.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM4.4 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L |