{"answers":{"affected":"3 open source packages ship an affected version, including github.com/zalando/skipper.","exploited":"There is no known exploitation of CVE-2026-54246 in the wild and no public exploit code.","fix":"Upgrade github.com/zalando/skipper to 0.27.13 or later.","what":"CVE-2026-54246 is a medium-severity missing authorization vulnerability in zalando skipper, published on 14 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-54246 and fix it if it is affected.\n\nWhat it is: CVE-2026-54246 is a medium-severity missing authorization vulnerability in zalando skipper, published on 14 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-54246 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/zalando/skipper (Go): affected all versions; fixed in 0.27.13\n- github.com/zalando/skipper (Go): affected all versions; fixed in 0.27.13\n- github.com/zalando/skipper (Go): affected all versions; fixed in 0.27.13\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-54246/ (Markdown: https://insights.sbomify.com/CVE-2026-54246/index.md)","id":"CVE-2026-54246","markdown":"https://insights.sbomify.com/CVE-2026-54246/index.md","name":"CVE-2026-54246","record":{"aliases":["GHSA-5587-2x54-jj6h","GO-2026-6018"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["data_read"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"HTTP reverse proxy","requires_auth":"low_privilege","summary":"Attackers can access sensitive cluster configuration data via unauthenticated API endpoints in Skipper routesrv, exposing backend URLs and shard addresses.","user_interaction":"not_required","vuln_class":"missing_authorization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":5.7,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-306","name":"Missing Authentication for Critical Functionality"}],"description":"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.","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Skipper routesrv-no-auth: All routesrv API Endpoints Lack Authentication","id":"CVE-2026-54246","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"missing_authorization","year":"2026"},"n_packages":3,"n_references":4,"next":{"headline":"Skipper: Unbounded Request Body Read in Admission Webhook Causes Memory Exhaustion DoS","id":"CVE-2026-54247"},"packages":[{"ecosystem":"Go","fixed":["0.27.13"],"introduced":["0"],"last_affected":[],"package":"github.com/zalando/skipper","purl":null,"source":"GHSA-5587-2x54-jj6h"},{"ecosystem":"Go","fixed":["0.27.13"],"introduced":["0"],"last_affected":[],"package":"github.com/zalando/skipper","purl":"pkg:golang/github.com/zalando/skipper","source":"GHSA-5587-2x54-jj6h"},{"ecosystem":"Go","fixed":["0.27.13"],"introduced":["0"],"last_affected":[],"package":"github.com/zalando/skipper","purl":"pkg:golang/github.com/zalando/skipper","source":"GO-2026-6018"}],"prev":{"headline":"Fleet: SQL injection in Okta conditional access endpoint allows host-controlled compromise of the Fleet database","id":"CVE-2026-54245"},"products":["skipper"],"published":"2026-09-14","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"Go Vulnerability Database","prefix":"GO"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-09-15","vendors":["zalando"]},"summary":"Attackers can access sensitive cluster configuration data via unauthenticated API endpoints in Skipper routesrv, exposing backend URLs and shard addresses.","url":"https://insights.sbomify.com/CVE-2026-54246/"}