{"items":[{"id":"NVI-00010138","kind":"vulnerability","title":"chi: Client IP spoofing in ClientIPFromXFF via X-Forwarded-For","revision":3,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-j6qf-3m9c-vwj3","CVE-2026-114437"],"plain_summary":"GitHub lists this reviewed advisory for github.com/go-chi/chi/v5. 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-04845921b623f91b7299bc965e8a8dea"],"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":"2026-10-23T20:56:47.000Z","value":"4.8 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-2ad06abeac87629a8413153f5519a508"},{"kind":"EPSS","as_of":"2026-11-04T12:03:12.000Z","value":"0.129%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.026. Missing scores are unknown.","source_id":"sr-04845921b623f91b7299bc965e8a8dea"}],"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-2ad06abeac87629a8413153f5519a508","url":"https://github.com/advisories/GHSA-j6qf-3m9c-vwj3","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-j6qf-3m9c-vwj3","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T22:07:08.657Z"},{"id":"sr-04845921b623f91b7299bc965e8a8dea","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-2026-114437","publisher":"FIRST EPSS","observed_at":"2026-11-04T17:58:50.313Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-2ad06abeac87629a8413153f5519a508"],"technology":"github.com/go-chi/chi/v5","known_exclusions":[],"conditions_summary":"### Summary\n\n`ClientIPFromXFF` skips any `X-Forwarded-For` entry in a configured trusted CIDR but never verifies that the direct TCP peer in `http.Request.RemoteAddr` belongs to that CIDR. A client that can reach the Go server directly can therefore append a trusted-looking proxy address and choose the client IP returned by `middleware.GetClientIP`.\n\nThe attack is remote and requires one unauthenticated HTTP request with no user interaction (AV:N/AC:L/PR:N/UI:N). It changes security decisions and exposes one protected handler within the same application (S:U/C:L/I:L); no availability loss was observed (A:N).\n\n**Preconditions:** The application uses `ClientIPFromXFF` and makes the origin server reachable by an anonymous client outside the configured trusted-proxy CIDRs. No victim interaction is required.\n\n1. Send `GET /admin` directly to the origin with no `X-Forwarded-For` header.\n2. Observe a `403 Forbidden` response and an empty derived client IP.\n3. Repeat the request with `X-Forwarded-For: 10.0.0.7, 198.51.100.42`.\n4. Observe `200 OK` and `client-ip=\"10.0.0.7\"`. Expected: the untrusted direct peer prevents the forwarding chain from being accepted.\n\n### Details\n\nThe vulnerable c","public_affected_ranges":["<= 5.3.2"]}],"null_published_at":"2026-11-06T07:24:11.251Z","source_updated_at":"2026-10-23T20:56:47.000Z","source_disclosed_at":"2026-10-23T20:56:46.000Z","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":"2026-10-31T22:07:08.657Z"},{"id":"NVI-00010138","kind":"vulnerability","title":"chi: Client IP spoofing in ClientIPFromXFF via X-Forwarded-For","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-j6qf-3m9c-vwj3","CVE-2026-114437"],"plain_summary":"GitHub lists this reviewed advisory for github.com/go-chi/chi/v5. 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-11fcdec48cef5f9370ad9d4eb10f02a0"],"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":"2026-10-23T20:56:47.000Z","value":"4.8 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-2ad06abeac87629a8413153f5519a508"},{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.129%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.02558. Missing scores are unknown.","source_id":"sr-11fcdec48cef5f9370ad9d4eb10f02a0"}],"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-2ad06abeac87629a8413153f5519a508","url":"https://github.com/advisories/GHSA-j6qf-3m9c-vwj3","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-j6qf-3m9c-vwj3","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T22:07:08.657Z"},{"id":"sr-11fcdec48cef5f9370ad9d4eb10f02a0","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-2026-114437","publisher":"FIRST EPSS","observed_at":"2026-10-31T22:20:46.853Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-2ad06abeac87629a8413153f5519a508"],"technology":"github.com/go-chi/chi/v5","known_exclusions":[],"conditions_summary":"### Summary\n\n`ClientIPFromXFF` skips any `X-Forwarded-For` entry in a configured trusted CIDR but never verifies that the direct TCP peer in `http.Request.RemoteAddr` belongs to that CIDR. A client that can reach the Go server directly can therefore append a trusted-looking proxy address and choose the client IP returned by `middleware.GetClientIP`.\n\nThe attack is remote and requires one unauthenticated HTTP request with no user interaction (AV:N/AC:L/PR:N/UI:N). It changes security decisions and exposes one protected handler within the same application (S:U/C:L/I:L); no availability loss was observed (A:N).\n\n**Preconditions:** The application uses `ClientIPFromXFF` and makes the origin server reachable by an anonymous client outside the configured trusted-proxy CIDRs. No victim interaction is required.\n\n1. Send `GET /admin` directly to the origin with no `X-Forwarded-For` header.\n2. Observe a `403 Forbidden` response and an empty derived client IP.\n3. Repeat the request with `X-Forwarded-For: 10.0.0.7, 198.51.100.42`.\n4. Observe `200 OK` and `client-ip=\"10.0.0.7\"`. Expected: the untrusted direct peer prevents the forwarding chain from being accepted.\n\n### Details\n\nThe vulnerable c","public_affected_ranges":["<= 5.3.2"]}],"null_published_at":"2026-10-31T22:27:12.383Z","source_updated_at":"2026-10-23T20:56:47.000Z","source_disclosed_at":"2026-10-23T20:56:46.000Z","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":"2026-10-31T22:07:08.657Z"},{"id":"NVI-00010138","kind":"vulnerability","title":"chi: Client IP spoofing in ClientIPFromXFF via X-Forwarded-For","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-j6qf-3m9c-vwj3","CVE-2026-114437"],"plain_summary":"GitHub lists this reviewed advisory for github.com/go-chi/chi/v5. 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-2ad06abeac87629a8413153f5519a508"],"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":"2026-10-23T20:56:47.000Z","value":"4.8 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-2ad06abeac87629a8413153f5519a508"}],"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-2ad06abeac87629a8413153f5519a508","url":"https://github.com/advisories/GHSA-j6qf-3m9c-vwj3","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-j6qf-3m9c-vwj3","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T22:07:08.657Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-2ad06abeac87629a8413153f5519a508"],"technology":"github.com/go-chi/chi/v5","known_exclusions":[],"conditions_summary":"### Summary\n\n`ClientIPFromXFF` skips any `X-Forwarded-For` entry in a configured trusted CIDR but never verifies that the direct TCP peer in `http.Request.RemoteAddr` belongs to that CIDR. A client that can reach the Go server directly can therefore append a trusted-looking proxy address and choose the client IP returned by `middleware.GetClientIP`.\n\nThe attack is remote and requires one unauthenticated HTTP request with no user interaction (AV:N/AC:L/PR:N/UI:N). It changes security decisions and exposes one protected handler within the same application (S:U/C:L/I:L); no availability loss was observed (A:N).\n\n**Preconditions:** The application uses `ClientIPFromXFF` and makes the origin server reachable by an anonymous client outside the configured trusted-proxy CIDRs. No victim interaction is required.\n\n1. Send `GET /admin` directly to the origin with no `X-Forwarded-For` header.\n2. Observe a `403 Forbidden` response and an empty derived client IP.\n3. Repeat the request with `X-Forwarded-For: 10.0.0.7, 198.51.100.42`.\n4. Observe `200 OK` and `client-ip=\"10.0.0.7\"`. Expected: the untrusted direct peer prevents the forwarding chain from being accepted.\n\n### Details\n\nThe vulnerable c","public_affected_ranges":["<= 5.3.2"]}],"null_published_at":"2026-10-31T22:13:48.417Z","source_updated_at":"2026-10-23T20:56:47.000Z","source_disclosed_at":"2026-10-23T20:56:46.000Z","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":"2026-10-31T22:07:08.657Z"}],"next_cursor":null,"snapshot_revision":"42594"}