{"answers":{"affected":"11 open source packages ship an affected version, including github.com/traefik/traefik/v3, github.com/traefik/traefik and github.com/traefik/traefik/v2. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-41174 in the wild and no public exploit code.","fix":"Upgrade github.com/traefik/traefik/v3 to a fixed version for your release line: 3.6.14 or 3.7.0-rc.2.","what":"CVE-2026-41174 is a medium-severity missing authorization vulnerability in Traefik Traefik, published on 30 Apr 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-2026-41174 and fix it if it is affected.\n\nWhat it is: CVE-2026-41174 is a medium-severity missing authorization vulnerability in Traefik Traefik, published on 30 Apr 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-2026-41174 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/traefik/traefik/v3 (Go): affected from 3.0.0-beta1; fixed in 3.6.14, 3.7.0-rc.2\n- github.com/traefik/traefik/v3 (Go): affected from 3.0.0-beta1; fixed in 3.6.14\n- github.com/traefik/traefik/v3 (Go): affected from 3.0.0-beta1; fixed in 3.6.14\n- github.com/traefik/traefik/v3 (Go): affected from 3.7.0-ea.1; fixed in 3.7.0-rc.2\n- github.com/traefik/traefik/v3 (Go): affected from 3.7.0-ea.1; fixed in 3.7.0-rc.2\n- github.com/traefik/traefik (Go): affected all versions; no fix listed\n- github.com/traefik/traefik (Go): affected all versions up to 1.7.34; no fix listed\n- github.com/traefik/traefik (Go): affected all versions up to 1.7.34; no fix listed\n- github.com/traefik/traefik/v2 (Go): affected all versions; fixed in 2.11.43\n- github.com/traefik/traefik/v2 (Go): affected all versions; fixed in 2.11.43\n- github.com/traefik/traefik/v2 (Go): affected all versions; fixed in 2.11.43\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-2026-41174/ (Markdown: https://insights.sbomify.com/CVE-2026-41174/index.md)","id":"CVE-2026-41174","markdown":"https://insights.sbomify.com/CVE-2026-41174/index.md","name":"CVE-2026-41174","record":{"aliases":["CLEANSTART-2026-XS53606","GHSA-xhjw-95fp-8vgq","GO-2026-5760","MINI-2x49-ccwm-8gvq","MINI-4c5v-x5w2-g27w","MINI-c5gx-9crm-5778"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"adjacent_or_local","non_default_config":true,"product_category":"Traefik reverse proxy","requires_auth":"low_privilege","summary":"Attackers with CRD permissions can bypass cross-namespace isolation to bind unauthorized middleware, requiring an upgrade to patched Traefik versions.","user_interaction":"not_required","vuln_class":"missing_authorization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"traefik","vendor":"traefik"}],"cvss":{"score":4.8,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","version":"4.0"},"cwes":[{"id":"CWE-863","name":"Incorrect Authorization"},{"id":"CWE-653","name":"Improper Isolation or Compartmentalization"}],"description":"Traefik is an HTTP reverse proxy and load balancer. Prior to versions 2.11.43, 3.6.14, and 3.7.0-rc.2, there is a potential vulnerability in Traefik's Kubernetes CRD provider cross-namespace isolation enforcement. When providers.kubernetesCRD.allowCrossNamespace=false, Traefik correctly rejects direct cross-namespace middleware references from IngressRoute objects, but fails to apply the same restriction to middleware references nested inside a Chain middleware's spec.chain.middlewares[]. An actor with permission to create or update Traefik CRDs in their own namespace can exploit this to cause Traefik to resolve and apply middleware objects from another namespace, bypassing the documented isolation boundary. This issue has been patched in versions 2.11.43, 3.6.14, and 3.7.0-rc.2.","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":"Traefik Kubernetes CRD allows unauthorized cross-namespace middleware binding","id":"CVE-2026-41174","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":"traefik:traefik","products":["traefik:traefik"],"type":"missing_authorization","year":"2026"},"n_packages":11,"n_references":5,"next":{"headline":"Statamic: Unsafe method invocation via query value resolution allows data destruction","id":"CVE-2026-41175"},"packages":[{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":[],"package":"github.com/traefik/traefik","purl":"pkg:golang/github.com/traefik/traefik","source":"GO-2026-5760"},{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":["1.7.34"],"package":"github.com/traefik/traefik","purl":null,"source":"GHSA-xhjw-95fp-8vgq"},{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":["1.7.34"],"package":"github.com/traefik/traefik","purl":"pkg:golang/github.com/traefik/traefik","source":"GHSA-xhjw-95fp-8vgq"},{"ecosystem":"Go","fixed":["2.11.43"],"introduced":["0"],"last_affected":[],"package":"github.com/traefik/traefik/v2","purl":null,"source":"GHSA-xhjw-95fp-8vgq"},{"ecosystem":"Go","fixed":["2.11.43"],"introduced":["0"],"last_affected":[],"package":"github.com/traefik/traefik/v2","purl":"pkg:golang/github.com/traefik/traefik/v2","source":"GHSA-xhjw-95fp-8vgq"},{"ecosystem":"Go","fixed":["2.11.43"],"introduced":["0"],"last_affected":[],"package":"github.com/traefik/traefik/v2","purl":"pkg:golang/github.com/traefik/traefik/v2","source":"GO-2026-5760"},{"ecosystem":"Go","fixed":["3.6.14","3.7.0-rc.2"],"introduced":["3.0.0-beta1","3.7.0-ea.1"],"last_affected":[],"package":"github.com/traefik/traefik/v3","purl":"pkg:golang/github.com/traefik/traefik/v3","source":"GO-2026-5760"},{"ecosystem":"Go","fixed":["3.6.14"],"introduced":["3.0.0-beta1"],"last_affected":[],"package":"github.com/traefik/traefik/v3","purl":null,"source":"GHSA-xhjw-95fp-8vgq"},{"ecosystem":"Go","fixed":["3.6.14"],"introduced":["3.0.0-beta1"],"last_affected":[],"package":"github.com/traefik/traefik/v3","purl":"pkg:golang/github.com/traefik/traefik/v3","source":"GHSA-xhjw-95fp-8vgq"},{"ecosystem":"Go","fixed":["3.7.0-rc.2"],"introduced":["3.7.0-ea.1"],"last_affected":[],"package":"github.com/traefik/traefik/v3","purl":null,"source":"GHSA-xhjw-95fp-8vgq"},{"ecosystem":"Go","fixed":["3.7.0-rc.2"],"introduced":["3.7.0-ea.1"],"last_affected":[],"package":"github.com/traefik/traefik/v3","purl":"pkg:golang/github.com/traefik/traefik/v3","source":"GHSA-xhjw-95fp-8vgq"}],"prev":{"headline":"Unbounded HTTP response body read in OpenTelemetry.Sampler.AWS","id":"CVE-2026-41173"},"products":["traefik"],"published":"2026-04-30","related":[{"cvss_score":9.8,"headline":"HTTP client can remove the X-Forwarded headers in Traefik","id":"CVE-2024-45410","kev_date_added":null,"published":"2024-09-19"},{"cvss_score":9.3,"headline":"Traefik v3.7.0 Authentication Bypass via from-to-www-redirect","id":"CVE-2026-88877","kev_date_added":null,"published":"2026-09-10"},{"cvss_score":9.3,"headline":"Traefik before v2.11.55 and v3.0.0 through v3.7.10 Authentication Bypass via digestAuth","id":"CVE-2026-85595","kev_date_added":null,"published":"2026-09-04"},{"cvss_score":9.1,"headline":"Traefik HTTP/3 Backend NTLM Connection Reuse","id":"CVE-2026-88007","kev_date_added":null,"published":"2026-09-10"},{"cvss_score":8.8,"headline":"Traefik: Rootless HTTP/1 request-target routes as \"/\" but is forwarded verbatim, bypassing path-scoped routing, middleware guards and access logging","id":"CVE-2026-88009","kev_date_added":null,"published":"2026-09-10"},{"cvss_score":8.8,"headline":"Traefik has a possible vulnerability with the path matchers","id":"CVE-2025-32431","kev_date_added":null,"published":"2025-04-21"},{"cvss_score":8.2,"headline":"Traefik v3.7 Authentication Bypass via TLS Option Conflict","id":"CVE-2026-85596","kev_date_added":null,"published":"2026-09-04"}],"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":"US public information, NVD API terms","name":"NVD"},{"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":"2026-05-04","vendors":["traefik"]},"summary":"Attackers with CRD permissions can bypass cross-namespace isolation to bind unauthorized middleware, requiring an upgrade to patched Traefik versions.","url":"https://insights.sbomify.com/CVE-2026-41174/"}