Detections
Analytics

SCA: security update for github.com/zalando/skipper (GHSA-5587-2x54-jj6h)

medium Tenable Cloud Security Plugin ID 444836

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - Skipper is an HTTP router and reverse proxy for service composition. Prior to 0.27.13, the routesrv
 component serves cluster-wide control-plane data without application-layer authentication through /routes,
 /routes/{zone}, /swarm/redis/shards, and /swarm/valkey/shards. The handlers registered in
 routesrv/routesrv.go, eskipBytes.ServeHTTP in routesrv/eskipbytes.go, RedisHandler.ServeHTTP in
 routesrv/redishandler.go, and ValkeyHandler.ServeHTTP in routesrv/valkeyhandler.go only restrict HTTP
 methods and do not authenticate callers. A compromised or otherwise attacker-controlled pod that can reach
 routesrv on the Kubernetes cluster network can bypass its namespace-scoped RBAC and read Ingress and
 RouteGroup backend URLs, filter-chain and OAuth or OIDC path details, and Redis or Valkey shard addresses
 across namespaces. NetworkPolicy can restrict reachability but does not remove the missing-authentication
 condition, and the established impact is confidentiality exposure rather than direct integrity or
 availability loss. This issue is fixed in version 0.27.13. (CVE-2026-54246)

Solution

Update the github.com/zalando/skipper library and its related packages to version 0.27.13 or later.

See Also

https://github.com/advisories/GHSA-5587-2x54-jj6h

Plugin Details

Severity: Medium

ID: 444836

Version: Revision 1.3

Type: Local

Family: SCA Checks

Published: 7/18/2026

Updated: 9/15/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.78

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.1

Vector: CVSS2#AV:A/AC:L/Au:S/C:C/I:N/A:N

CVSS Score Source: CVE-2026-54246

CVSS v3

Risk Factor: Medium

Base Score: 5.7

Temporal Score: 5

Vector: CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 7/17/2026

Vulnerability Publication Date: 7/17/2026

Reference Information

CVE: CVE-2026-54246

cwe: CWE-306