CVE-2026-24470 (GCVE-0-2026-24470)
Vulnerability from cvelistv5 – Published: 2026-01-26 22:23 – Updated: 2026-01-27 14:51
VLAI
EPSS
VEX
Title
Skipper Ingress Controller Allows Unauthorized Access to Internal Services via ExternalName
Summary
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.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-27 14:50 UTC
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/zalando/skipper/security/advis… | x_refsource_CONFIRM |
| https://github.com/zalando/skipper/commit/a4c87ce… | x_refsource_MISC |
| https://kubernetes.io/docs/concepts/services-netw… | x_refsource_MISC |
Impacted products
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"version": "2.0.3"
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"title": "CISA ADP Vulnrichment"
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"cna": {
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}
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"version": "3.1"
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"cweId": "CWE-441",
"description": "CWE-441: Unintended Proxy or Intermediary (\u0027Confused Deputy\u0027)",
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{
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"url": "https://github.com/zalando/skipper/commit/a4c87ce029a58eb8e1c2c1f93049194a39cf6219"
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{
"name": "https://kubernetes.io/docs/concepts/services-networking/service/#externalname",
"tags": [
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"url": "https://kubernetes.io/docs/concepts/services-networking/service/#externalname"
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"dateReserved": "2026-01-23T00:38:20.546Z",
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"state": "PUBLISHED"
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"dataVersion": "5.2",
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"date": "2026-10-15",
"epss": "0.00306",
"percentile": "0.21863"
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"nvd": {
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"configurations": [
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"cpeMatch": [
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},
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}
],
"id": "CVE-2026-24470",
"lastModified": "2026-06-17T10:23:07.030",
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"version": "3.1"
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"impactScore": 5.2,
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"title": "Skipper Ingress Controller Allows Unauthorized Access to Internal Services via ExternalName",
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}
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"state": "PUBLISHED"
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}
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Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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