{"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-2026-54764 in the wild and no public exploit code.","fix":"Upgrade github.com/traefik/traefik/v3 to a fixed version for your release line: 3.6.22 or 3.7.6.","what":"CVE-2026-54764 is a medium-severity vulnerability in Traefik Traefik, published on 6 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-54764 and fix it if it is affected.\n\nWhat it is: CVE-2026-54764 is a medium-severity vulnerability in Traefik Traefik, published on 6 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-54764 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/traefik/traefik/v3 (Go): affected all versions; fixed in 3.6.22, 3.7.6\n- github.com/traefik/traefik/v3 (Go): affected all versions; fixed in 3.6.22\n- github.com/traefik/traefik/v3 (Go): affected all versions; fixed in 3.6.22\n- github.com/traefik/traefik/v3 (Go): affected from 3.7.0; fixed in 3.7.6\n- github.com/traefik/traefik/v3 (Go): affected from 3.7.0; fixed in 3.7.6\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 2.11.51\n- github.com/traefik/traefik/v2 (Go): affected all versions; fixed in 2.11.51\n- github.com/traefik/traefik/v2 (Go): affected all versions; fixed in 2.11.51\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-2026-54764/ (Markdown: https://insights.sbomify.com/CVE-2026-54764/index.md)","id":"CVE-2026-54764","markdown":"https://insights.sbomify.com/CVE-2026-54764/index.md","name":"CVE-2026-54764","record":{"aliases":["GHSA-3q9r-p662-5j8m","GO-2026-6202","MINI-97rh-fm88-394x","MINI-hxxh-4x85-8c3p","MINI-vhpw-52wf-c9m3"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Traefik reverse proxy","requires_auth":"none","summary":"Attackers can spoof X-Forwarded-Proto to bypass port-based authorization checks in Traefik's ForwardAuth middleware, even when trustForwardHeader is disabled.","user_interaction":"not_required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"traefik","vendor":"traefik"}],"cvss":{"score":6.9,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N","version":"4.0"},"cwes":[{"id":"CWE-345","name":"Insufficient Verification of Data Authenticity"}],"description":"Traefik is an HTTP reverse proxy and load balancer. Prior to v2.11.51, v3.6.22, and v3.7.6, Traefik's ForwardAuth middleware, even when configured with trustForwardHeader: false, derives the X-Forwarded-Port header sent to the authentication service from the original incoming request instead of the sanitized forwarded request. As a result, an unauthenticated remote attacker can inject an X-Forwarded-Proto: https header over a plain HTTP connection and cause Traefik to forward X-Forwarded-Port: 443 to the authentication service, bypassing port-based authorization checks. This issue is fixed in versions v2.11.51, v3.6.22, and v3.7.6.","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":"ForwardAuth middleware leaks X-Forwarded-Port spoofing via untrusted X-Forwarded-Proto when trustForwardHeader=false","id":"CVE-2026-54764","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":"traefik:traefik","products":["traefik:traefik"],"type":"security_feature_bypass","year":"2026"},"n_packages":11,"n_references":3,"next":{"headline":"Traefik: Gateway HTTPRoute backendRef filters can leak backend context across routes sharing a Service:port","id":"CVE-2026-54765"},"packages":[{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":[],"package":"github.com/traefik/traefik","purl":"pkg:golang/github.com/traefik/traefik","source":"GO-2026-6202"},{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":["1.7.34"],"package":"github.com/traefik/traefik","purl":null,"source":"GHSA-3q9r-p662-5j8m"},{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":["1.7.34"],"package":"github.com/traefik/traefik","purl":"pkg:golang/github.com/traefik/traefik","source":"GHSA-3q9r-p662-5j8m"},{"ecosystem":"Go","fixed":["2.11.51"],"introduced":["0"],"last_affected":[],"package":"github.com/traefik/traefik/v2","purl":null,"source":"GHSA-3q9r-p662-5j8m"},{"ecosystem":"Go","fixed":["2.11.51"],"introduced":["0"],"last_affected":[],"package":"github.com/traefik/traefik/v2","purl":"pkg:golang/github.com/traefik/traefik/v2","source":"GHSA-3q9r-p662-5j8m"},{"ecosystem":"Go","fixed":["2.11.51"],"introduced":["0"],"last_affected":[],"package":"github.com/traefik/traefik/v2","purl":"pkg:golang/github.com/traefik/traefik/v2","source":"GO-2026-6202"},{"ecosystem":"Go","fixed":["3.6.22","3.7.6"],"introduced":["0","3.7.0"],"last_affected":[],"package":"github.com/traefik/traefik/v3","purl":"pkg:golang/github.com/traefik/traefik/v3","source":"GO-2026-6202"},{"ecosystem":"Go","fixed":["3.6.22"],"introduced":["0"],"last_affected":[],"package":"github.com/traefik/traefik/v3","purl":null,"source":"GHSA-3q9r-p662-5j8m"},{"ecosystem":"Go","fixed":["3.6.22"],"introduced":["0"],"last_affected":[],"package":"github.com/traefik/traefik/v3","purl":"pkg:golang/github.com/traefik/traefik/v3","source":"GHSA-3q9r-p662-5j8m"},{"ecosystem":"Go","fixed":["3.7.6"],"introduced":["3.7.0"],"last_affected":[],"package":"github.com/traefik/traefik/v3","purl":null,"source":"GHSA-3q9r-p662-5j8m"},{"ecosystem":"Go","fixed":["3.7.6"],"introduced":["3.7.0"],"last_affected":[],"package":"github.com/traefik/traefik/v3","purl":"pkg:golang/github.com/traefik/traefik/v3","source":"GHSA-3q9r-p662-5j8m"}],"prev":{"headline":"Traefik: headerField underscore-variant identity spoofing in BasicAuth / DigestAuth / ForwardAuth","id":"CVE-2026-54763"},"products":["traefik"],"published":"2026-07-06","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":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-07-07","vendors":["traefik"]},"summary":"Attackers can spoof X-Forwarded-Proto to bypass port-based authorization checks in Traefik's ForwardAuth middleware, even when trustForwardHeader is disabled.","url":"https://insights.sbomify.com/CVE-2026-54764/"}