CVE-2025-22870

golang.org/x/net/proxy: golang.org/x/net/http/httpproxy: HTTP Proxy bypass using IPv6 Zone IDs in golang.org/x/net

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Severity

Moderate

Red Hat Product Security

4.4

CVSS 3.1

Review impact separately from score.

Published · March 13, 2025

Updated · November 4, 2026

Description

A flaw was found in proxy host matching. This vulnerability allows improper bypassing of proxy settings via manipulating an IPv6 zone ID, causing unintended matches against the NO_PROXY environment variable.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

CVSS / CWE

CVSS 3.1 · 4.4
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L

CWE-20 · Improper Input Validation