Skipper is an HTTP router and reverse proxy for service composition. Prior to version 0.24.0, when running Skipper as an Ingress controller, users with permissions to create an Ingress and a Service of type ExternalName can create routes that enable them to use Skipper's network access to reach internal services. Version 0.24.0 disables Kubernetes ExternalName by default. As a workaround, developers can allow list targets of an ExternalName and allow list via regular expressions.
Advisories
Source ID Title
Github GHSA Github GHSA GHSA-mxxc-p822-2hx9 Skipper Ingress Controller Allows Unauthorized Access to Internal Services via ExternalName
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Tue, 27 Jan 2026 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Tue, 27 Jan 2026 09:15:00 +0000

Type Values Removed Values Added
First Time appeared Zalando
Zalando skipper
Vendors & Products Zalando
Zalando skipper

Mon, 26 Jan 2026 22:45:00 +0000

Type Values Removed Values Added
Description Skipper is an HTTP router and reverse proxy for service composition. Prior to version 0.24.0, when running Skipper as an Ingress controller, users with permissions to create an Ingress and a Service of type ExternalName can create routes that enable them to use Skipper's network access to reach internal services. Version 0.24.0 disables Kubernetes ExternalName by default. As a workaround, developers can allow list targets of an ExternalName and allow list via regular expressions.
Title Skipper Ingress Controller Allows Unauthorized Access to Internal Services via ExternalName
Weaknesses CWE-441
CWE-918
References
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-01-27T14:51:35.229Z

Reserved: 2026-01-23T00:38:20.546Z

Link: CVE-2026-24470

cve-icon Vulnrichment

Updated: 2026-01-27T14:51:31.267Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-01-26T23:16:09.123

Modified: 2026-01-27T14:59:34.073

Link: CVE-2026-24470

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-01-27T09:03:12Z

Weaknesses