{"items":[{"id":"NVI-00015348","kind":"vulnerability","title":"Traefik: ForwardAuth middleware leaks X-Forwarded-Port spoofing via untrusted X-Forwarded-Proto when trustForwardHeader=false","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-3q9r-p662-5j8m","CVE-2026-54764"],"plain_summary":"GitHub lists this reviewed advisory for github.com/traefik/traefik/v2, github.com/traefik/traefik/v3, github.com/traefik/traefik/v3, github.com/traefik/traefik. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-154cd376e06ae9d026c7319325b99e0a"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-08-06T16:38:30.000Z","value":"5.8 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-5dd629fd6dbfcc7142d3976b8372aafb"},{"kind":"EPSS","as_of":"2026-11-04T12:03:12.000Z","value":"0.281%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.20692. Missing scores are unknown.","source_id":"sr-154cd376e06ae9d026c7319325b99e0a"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-5dd629fd6dbfcc7142d3976b8372aafb","url":"https://github.com/advisories/GHSA-3q9r-p662-5j8m","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-3q9r-p662-5j8m","publisher":"GitHub Advisory Database","observed_at":"2026-11-03T02:28:46.523Z"},{"id":"sr-154cd376e06ae9d026c7319325b99e0a","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2026-54764","publisher":"FIRST EPSS","observed_at":"2026-11-04T17:58:50.332Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-5dd629fd6dbfcc7142d3976b8372aafb"],"technology":"github.com/traefik/traefik/v2","known_exclusions":[],"conditions_summary":"## Summary\n\nThere is a medium severity vulnerability in Traefik's ForwardAuth middleware. Even when configured with `trustForwardHeader: false`, Traefik 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 auth service, bypassing port-based authorization checks. This is a regression of the incomplete fix for GHSA-6384-m2mw-rf54, which addressed the `X-Forwarded-Proto` and `X-Forwarded-Prefix` spoofing vectors but missed the `X-Forwarded-Port` vector.\n\n## Patches\n\n- https://github.com/traefik/traefik/releases/tag/v2.11.51\n- https://github.com/traefik/traefik/releases/tag/v3.6.22\n- https://github.com/traefik/traefik/releases/tag/v3.7.6\n\n## For more information\n\nIf you have any questions or comments about this advisory, please open an issue.\n\n\nOriginal Description\n\n### Summary\n\n  The ForwardAuth middleware, even when configured with `","public_affected_ranges":["<= 2.11.50"]},{"certainty":"source_listed","source_ids":["sr-5dd629fd6dbfcc7142d3976b8372aafb"],"technology":"github.com/traefik/traefik/v3","known_exclusions":[],"conditions_summary":"## Summary\n\nThere is a medium severity vulnerability in Traefik's ForwardAuth middleware. Even when configured with `trustForwardHeader: false`, Traefik 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 auth service, bypassing port-based authorization checks. This is a regression of the incomplete fix for GHSA-6384-m2mw-rf54, which addressed the `X-Forwarded-Proto` and `X-Forwarded-Prefix` spoofing vectors but missed the `X-Forwarded-Port` vector.\n\n## Patches\n\n- https://github.com/traefik/traefik/releases/tag/v2.11.51\n- https://github.com/traefik/traefik/releases/tag/v3.6.22\n- https://github.com/traefik/traefik/releases/tag/v3.7.6\n\n## For more information\n\nIf you have any questions or comments about this advisory, please open an issue.\n\n\nOriginal Description\n\n### Summary\n\n  The ForwardAuth middleware, even when configured with `","public_affected_ranges":["<= 3.6.21"]},{"certainty":"source_listed","source_ids":["sr-5dd629fd6dbfcc7142d3976b8372aafb"],"technology":"github.com/traefik/traefik/v3","known_exclusions":[],"conditions_summary":"## Summary\n\nThere is a medium severity vulnerability in Traefik's ForwardAuth middleware. Even when configured with `trustForwardHeader: false`, Traefik 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 auth service, bypassing port-based authorization checks. This is a regression of the incomplete fix for GHSA-6384-m2mw-rf54, which addressed the `X-Forwarded-Proto` and `X-Forwarded-Prefix` spoofing vectors but missed the `X-Forwarded-Port` vector.\n\n## Patches\n\n- https://github.com/traefik/traefik/releases/tag/v2.11.51\n- https://github.com/traefik/traefik/releases/tag/v3.6.22\n- https://github.com/traefik/traefik/releases/tag/v3.7.6\n\n## For more information\n\nIf you have any questions or comments about this advisory, please open an issue.\n\n\nOriginal Description\n\n### Summary\n\n  The ForwardAuth middleware, even when configured with `","public_affected_ranges":[">= 3.7.0, <= 3.7.5"]},{"certainty":"source_listed","source_ids":["sr-5dd629fd6dbfcc7142d3976b8372aafb"],"technology":"github.com/traefik/traefik","known_exclusions":[],"conditions_summary":"## Summary\n\nThere is a medium severity vulnerability in Traefik's ForwardAuth middleware. Even when configured with `trustForwardHeader: false`, Traefik 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 auth service, bypassing port-based authorization checks. This is a regression of the incomplete fix for GHSA-6384-m2mw-rf54, which addressed the `X-Forwarded-Proto` and `X-Forwarded-Prefix` spoofing vectors but missed the `X-Forwarded-Port` vector.\n\n## Patches\n\n- https://github.com/traefik/traefik/releases/tag/v2.11.51\n- https://github.com/traefik/traefik/releases/tag/v3.6.22\n- https://github.com/traefik/traefik/releases/tag/v3.7.6\n\n## For more information\n\nIf you have any questions or comments about this advisory, please open an issue.\n\n\nOriginal Description\n\n### Summary\n\n  The ForwardAuth middleware, even when configured with `","public_affected_ranges":["<= 1.7.34"]}],"null_published_at":"2026-11-08T19:53:38.928Z","source_updated_at":"2026-08-06T16:38:30.000Z","source_disclosed_at":"2026-08-06T16:38:29.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.","null_first_observed_at":"2026-11-03T02:28:46.523Z"},{"id":"NVI-00015348","kind":"vulnerability","title":"Traefik: ForwardAuth middleware leaks X-Forwarded-Port spoofing via untrusted X-Forwarded-Proto when trustForwardHeader=false","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-3q9r-p662-5j8m","CVE-2026-54764"],"plain_summary":"GitHub lists this reviewed advisory for github.com/traefik/traefik/v2, github.com/traefik/traefik/v3, github.com/traefik/traefik/v3, github.com/traefik/traefik. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-5dd629fd6dbfcc7142d3976b8372aafb"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-08-06T16:38:30.000Z","value":"5.8 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-5dd629fd6dbfcc7142d3976b8372aafb"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-5dd629fd6dbfcc7142d3976b8372aafb","url":"https://github.com/advisories/GHSA-3q9r-p662-5j8m","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-3q9r-p662-5j8m","publisher":"GitHub Advisory Database","observed_at":"2026-11-03T02:28:46.523Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-5dd629fd6dbfcc7142d3976b8372aafb"],"technology":"github.com/traefik/traefik/v2","known_exclusions":[],"conditions_summary":"## Summary\n\nThere is a medium severity vulnerability in Traefik's ForwardAuth middleware. Even when configured with `trustForwardHeader: false`, Traefik 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 auth service, bypassing port-based authorization checks. This is a regression of the incomplete fix for GHSA-6384-m2mw-rf54, which addressed the `X-Forwarded-Proto` and `X-Forwarded-Prefix` spoofing vectors but missed the `X-Forwarded-Port` vector.\n\n## Patches\n\n- https://github.com/traefik/traefik/releases/tag/v2.11.51\n- https://github.com/traefik/traefik/releases/tag/v3.6.22\n- https://github.com/traefik/traefik/releases/tag/v3.7.6\n\n## For more information\n\nIf you have any questions or comments about this advisory, please open an issue.\n\n\nOriginal Description\n\n### Summary\n\n  The ForwardAuth middleware, even when configured with `","public_affected_ranges":["<= 2.11.50"]},{"certainty":"source_listed","source_ids":["sr-5dd629fd6dbfcc7142d3976b8372aafb"],"technology":"github.com/traefik/traefik/v3","known_exclusions":[],"conditions_summary":"## Summary\n\nThere is a medium severity vulnerability in Traefik's ForwardAuth middleware. Even when configured with `trustForwardHeader: false`, Traefik 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 auth service, bypassing port-based authorization checks. This is a regression of the incomplete fix for GHSA-6384-m2mw-rf54, which addressed the `X-Forwarded-Proto` and `X-Forwarded-Prefix` spoofing vectors but missed the `X-Forwarded-Port` vector.\n\n## Patches\n\n- https://github.com/traefik/traefik/releases/tag/v2.11.51\n- https://github.com/traefik/traefik/releases/tag/v3.6.22\n- https://github.com/traefik/traefik/releases/tag/v3.7.6\n\n## For more information\n\nIf you have any questions or comments about this advisory, please open an issue.\n\n\nOriginal Description\n\n### Summary\n\n  The ForwardAuth middleware, even when configured with `","public_affected_ranges":["<= 3.6.21"]},{"certainty":"source_listed","source_ids":["sr-5dd629fd6dbfcc7142d3976b8372aafb"],"technology":"github.com/traefik/traefik/v3","known_exclusions":[],"conditions_summary":"## Summary\n\nThere is a medium severity vulnerability in Traefik's ForwardAuth middleware. Even when configured with `trustForwardHeader: false`, Traefik 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 auth service, bypassing port-based authorization checks. This is a regression of the incomplete fix for GHSA-6384-m2mw-rf54, which addressed the `X-Forwarded-Proto` and `X-Forwarded-Prefix` spoofing vectors but missed the `X-Forwarded-Port` vector.\n\n## Patches\n\n- https://github.com/traefik/traefik/releases/tag/v2.11.51\n- https://github.com/traefik/traefik/releases/tag/v3.6.22\n- https://github.com/traefik/traefik/releases/tag/v3.7.6\n\n## For more information\n\nIf you have any questions or comments about this advisory, please open an issue.\n\n\nOriginal Description\n\n### Summary\n\n  The ForwardAuth middleware, even when configured with `","public_affected_ranges":[">= 3.7.0, <= 3.7.5"]},{"certainty":"source_listed","source_ids":["sr-5dd629fd6dbfcc7142d3976b8372aafb"],"technology":"github.com/traefik/traefik","known_exclusions":[],"conditions_summary":"## Summary\n\nThere is a medium severity vulnerability in Traefik's ForwardAuth middleware. Even when configured with `trustForwardHeader: false`, Traefik 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 auth service, bypassing port-based authorization checks. This is a regression of the incomplete fix for GHSA-6384-m2mw-rf54, which addressed the `X-Forwarded-Proto` and `X-Forwarded-Prefix` spoofing vectors but missed the `X-Forwarded-Port` vector.\n\n## Patches\n\n- https://github.com/traefik/traefik/releases/tag/v2.11.51\n- https://github.com/traefik/traefik/releases/tag/v3.6.22\n- https://github.com/traefik/traefik/releases/tag/v3.7.6\n\n## For more information\n\nIf you have any questions or comments about this advisory, please open an issue.\n\n\nOriginal Description\n\n### Summary\n\n  The ForwardAuth middleware, even when configured with `","public_affected_ranges":["<= 1.7.34"]}],"null_published_at":"2026-11-03T10:03:31.350Z","source_updated_at":"2026-08-06T16:38:30.000Z","source_disclosed_at":"2026-08-06T16:38:29.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-11-03T02:28:46.523Z"}],"next_cursor":null,"snapshot_revision":"42594"}