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.
Published: 2025-03-12
Score: 4.4 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Proxy bypass leading to unintended direct connections
Action: Patch
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
EUVD EUVD EUVD-2025-6690 HTTP Proxy bypass using IPv6 Zone IDs in golang.org/x/net
Github GHSA Github GHSA GHSA-qxp5-gwg8-xv66 HTTP Proxy bypass using IPv6 Zone IDs in golang.org/x/net
Ubuntu USN Ubuntu USN USN-7574-1 Go vulnerabilities
History

Thu, 16 Apr 2026 22:45:00 +0000


Sat, 12 Jul 2025 13:45:00 +0000

Type Values Removed Values Added
Metrics epss

{'score': 0.00012}

epss

{'score': 0.00014}


Thu, 15 May 2025 06:45:00 +0000

Type Values Removed Values Added
First Time appeared Redhat
Redhat openshift Data Foundation
CPEs cpe:/a:redhat:openshift_data_foundation:4.18::el9
Vendors & Products Redhat
Redhat openshift Data Foundation

Fri, 09 May 2025 20:45:00 +0000

Type Values Removed Values Added
References

Tue, 18 Mar 2025 17:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-115
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 14 Mar 2025 02:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-20
References
Metrics threat_severity

None

cvssV3_1

{'score': 4.4, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L'}

threat_severity

Moderate


Wed, 12 Mar 2025 19:45:00 +0000

Type Values Removed Values Added
References

Wed, 12 Mar 2025 18:45:00 +0000

Type Values Removed Values Added
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.
Title HTTP Proxy bypass using IPv6 Zone IDs in golang.org/x/net
References

Subscriptions

Redhat Openshift Data Foundation
cve-icon MITRE

Status: PUBLISHED

Assigner: Go

Published:

Updated: 2026-04-16T22:39:33.619Z

Reserved: 2025-01-08T19:11:42.834Z

Link: CVE-2025-22870

cve-icon Vulnrichment

Updated: 2025-05-09T20:03:37.043Z

cve-icon NVD

Status : Deferred

Published: 2025-03-12T19:15:38.310

Modified: 2026-04-16T23:16:32.860

Link: CVE-2025-22870

cve-icon Redhat

Severity : Moderate

Publid Date: 2025-03-12T18:27:59Z

Links: CVE-2025-22870 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-04-20T16:00:10Z

Weaknesses