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TI-2026-19725 Aliases CVE-2026-24470GHSA-mxxc-p822-2hx9

Skipper Ingress Controller Allows Unauthorized Access to Internal Services via ExternalName

Priority LOW 37CWE-441Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00311 24th percentileScored 2026-11-07
Fix Fixed skipper (zalando): 0.24.0github.com/zalando/skipper (Go): 0.24.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
zalandoskipperbefore 0.24.00.24.0Patch availableCNA
—github.com/zalando/skipper (Go)before 0.24.00.24.0Patch availableGHSA-mxxc-p822-2hx9
  • skipper Vendorzalando Affected before 0.24.0 Fixed in 0.24.0 Patch available CNA
  • github.com/zalando/skipper (Go) Vendor— Affected before 0.24.0 Fixed in 0.24.0 Patch available GHSA-mxxc-p822-2hx9

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:zalando:skipper:*:*:*:*:*:*:*:*before 0.24.0Vulnerablezalando
  • cpe:2.3:a:zalando:skipper:*:*:*:*:*:*:*:* Versions before 0.24.0 Vulnerable ·zalando

Remediation

  • Fix · CNA skipper (zalando) Fixed in 0.24.0
  • Fix · GHSA-mxxc-p822-2hx9 github.com/zalando/skipper (Go) Fixed in 0.24.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-24470
  2. 2026-10-03 Alias added: GHSA-mxxc-p822-2hx9

References

Patch 1

Advisory 2

Other 3

  • TI-2022-18154 Zalando Skipper v0.13.236 is vulnerable to Server-Side Request Forgery (SSRF). CVSS 3.1CRITICAL 9.8
  • TI-2026-19115 Skipper arbitrary code execution through lua filters CVSS 3.1HIGH 8.8
  • TI-2022-15208 In Zalando Skipper before 0.13.218, a query predicate could be bypassed via a prepared request. CVSS 3.1HIGH 7.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences