{"cve":"CVE-2026-29054","nvd":{"published":"2026-03-05T19:16:15.277","modified":"2026-07-15T02:19:22.153","status":"Modified","description":"Traefik is an HTTP reverse proxy and load balancer. From version 2.11.9 to 2.11.37 and from version 3.1.3 to 3.6.8, there is a potential vulnerability in Traefik managing the Connection header with X-Forwarded headers. When Traefik processes HTTP/1.1 requests, the protection put in place to prevent the removal of Traefik-managed X-Forwarded headers (such as X-Real-Ip, X-Forwarded-Host, X-Forwarded-Port, etc.) via the Connection header does not handle case sensitivity correctly. The Connection tokens are compared case-sensitively against the protected header names, but the actual header deletion operates case-insensitively. As a result, a remote unauthenticated client can use lowercase Connection tokens (e.g. Connection: x-real-ip) to bypass the protection and trigger the removal of Traefik-managed forwarded identity headers. This issue has been patched in versions 2.11.38 and 3.6.9.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","score":7.5},"cwes":["CWE-178"],"references":["https://github.com/traefik/traefik/releases/tag/v2.11.38","https://github.com/traefik/traefik/releases/tag/v3.6.9","https://github.com/traefik/traefik/security/advisories/GHSA-92mv-8f8w-wq52","https://access.redhat.com/errata/RHSA-2026:10175","https://access.redhat.com/security/cve/CVE-2026-29054"],"products":["traefik:traefik"],"source":"nvd","synced_at":"2026-10-19T22:25:53.701907451+00:00"},"epss":{"cve":"CVE-2026-29054","score":0.0053,"percentile":0.44855,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-92mv-8f8w-wq52","url":"https://osv.dev/vulnerability/GHSA-92mv-8f8w-wq52","summary":"traefik CVE-2024-45410 fix bypass: lowercase `Connection` tokens can delete traefik-managed forwarded identity headers (for example, `X-Real-Ip`)","modified":"2026-04-16T02:14:29.127521703Z","packages":[{"ecosystem":"Go","name":"github.com/traefik/traefik/v2","purl":"pkg:golang/github.com/traefik/traefik/v2","ranges":[">=2.11.9 <2.11.38"],"fixed":["2.11.38"]},{"ecosystem":"Go","name":"github.com/traefik/traefik/v3","purl":"pkg:golang/github.com/traefik/traefik/v3","ranges":[">=3.1.3 <3.6.9"],"fixed":["3.6.9"]}]},{"id":"GO-2026-4597","url":"https://osv.dev/vulnerability/GO-2026-4597","summary":"traefik CVE-2024-45410 fix bypass: lowercase `Connection` tokens can delete traefik-managed forwarded identity headers (for example, `X-Real-Ip`) in github.com/traefik/traefik","modified":"2026-04-16T02:14:31.214652200Z","packages":[{"ecosystem":"Go","name":"github.com/traefik/traefik","purl":"pkg:golang/github.com/traefik/traefik","ranges":["all versions"],"fixed":[]},{"ecosystem":"Go","name":"github.com/traefik/traefik/v2","purl":"pkg:golang/github.com/traefik/traefik/v2","ranges":[">=2.11.9 <2.11.38"],"fixed":["2.11.38"]},{"ecosystem":"Go","name":"github.com/traefik/traefik/v3","purl":"pkg:golang/github.com/traefik/traefik/v3","ranges":[">=3.1.3 <3.6.9"],"fixed":["3.6.9"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}