CVE-2026-54246Public exploitHinoki check available

Cluster-wide data disclosure via unauthenticated routesrv endpoints

Published Sep 14, 2026 · Updated Sep 14, 2026

Missing authentication in Zalando Skipper before 0.27.13 allows remote attackers in a Kubernetes cluster to read control-plane data. The routesrv handlers for /routes and shard endpoints accept GET or HEAD requests and return route or cache topology without authenticating the caller. Reachability from an attacker-controlled pod is required; exposure is limited to cluster-wide routing, filter, backend, and shard details, with no established data modification or service interruption.

CVSS severity5.7
Medium
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Missing authentication in Zalando Skipper before 0.27.13 allows remote attackers in a Kubernetes cluster to read control-plane data. The routesrv handlers for /routes and shard endpoints accept GET or HEAD requests and return route or cache topology without authenticating the caller. Reachability from an attacker-controlled pod is required; exposure is limited to cluster-wide routing, filter, backend, and shard details, with no established data modification or service interruption.

The record

CVE
CVE-2026-54246
Published
Sep 14, 2026
Updated
Sep 14, 2026
Vendor
Zalando
Product
Skipper
Classifications
CWE-306, T1613
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.27.13

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Zalando · Skipperversion=< 0.27.13

Published CVSS scores

5.7GitHubCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
T1613Container and Resource Discovery

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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