CVE-2026-46415

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-46415", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-05-13T21:04:10.933Z", "datePublished": "2026-07-20T15:05:21.961Z", "dateUpdated": "2026-07-21T13:53:08.959Z"}, "containers": {"cna": {"title": "Caddy Defender trusted proxy client IP bypass", "problemTypes": [{"descriptions": [{"cweId": "CWE-284", "lang": "en", "description": "CWE-284: Improper Access Control", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-348", "lang": "en", "description": "CWE-348: Use of Less Trusted Source", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 8.2, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/JasonLovesDoggo/caddy-defender/security/advisories/GHSA-3h23-rrpc-3p87", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/JasonLovesDoggo/caddy-defender/security/advisories/GHSA-3h23-rrpc-3p87"}, {"name": "https://github.com/JasonLovesDoggo/caddy-defender/pull/139", "tags": ["x_refsource_MISC"], "url": "https://github.com/JasonLovesDoggo/caddy-defender/pull/139"}, {"name": "https://caddyserver.com/docs/caddyfile/matchers#client-ip", "tags": ["x_refsource_MISC"], "url": "https://caddyserver.com/docs/caddyfile/matchers#client-ip"}, {"name": "https://caddyserver.com/docs/caddyfile/options#trusted-proxies", "tags": ["x_refsource_MISC"], "url": "https://caddyserver.com/docs/caddyfile/options#trusted-proxies"}], "affected": [{"vendor": "JasonLovesDoggo", "product": "caddy-defender", "versions": [{"version": "< 0.10.1", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-07-20T15:05:21.961Z"}, "descriptions": [{"lang": "en", "value": "The Caddy Defender plugin is a middleware for Caddy that allows users to block or manipulate requests based on the client's IP address. Prior to version 0.10.1, Caddy Defender used `r.RemoteAddr` when evaluating whether a request should be blocked. `RemoteAddr` is the address of the immediate peer connected to Caddy. In deployments where Caddy is behind a trusted proxy, CDN, or load balancer, the immediate peer is usually the proxy, not the original client. Caddy resolves the original client address into its `client_ip` request variable after applying the configured `trusted_proxies` policy, but Defender did not use that value. As a result, clients from blocked IP ranges could bypass Defender when accessing Caddy through a trusted proxy whose own IP address was not blocked. This affects deployments that use Defender behind trusted proxies and expect it to enforce blocking based on the real client IP. The issue is fixed in version 0.10.1 by making Defender prefer Caddys resolved `client_ip` request variable when it is available. Defender falls back to `RemoteAddr` only when Caddy has not provided a resolved client IP. There is no complete workaround in affected Defender versions for deployments that rely on Caddy's trusted proxy client IP resolution. Until upgrading, affected users should enforce equivalent IP blocking at the trusted proxy, CDN, load balancer, firewall, or other edge layer before traffic reaches Caddy. Deployments where Caddy receives traffic directly from clients, without an intermediate trusted proxy, are not affected by this bypass."}], "source": {"advisory": "GHSA-3h23-rrpc-3p87", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-07-21T13:52:55.935258Z", "id": "CVE-2026-46415", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-21T13:53:08.959Z"}}]}}

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-46415", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-05-13T21:04:10.933Z", "datePublished": "2026-07-20T15:05:21.961Z", "dateUpdated": "2026-07-21T13:53:08.959Z"}, "containers": {"cna": {"title": "Caddy Defender trusted proxy client IP bypass", "problemTypes": [{"descriptions": [{"cweId": "CWE-284", "lang": "en", "description": "CWE-284: Improper Access Control", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-348", "lang": "en", "description": "CWE-348: Use of Less Trusted Source", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 8.2, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/JasonLovesDoggo/caddy-defender/security/advisories/GHSA-3h23-rrpc-3p87", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/JasonLovesDoggo/caddy-defender/security/advisories/GHSA-3h23-rrpc-3p87"}, {"name": "https://github.com/JasonLovesDoggo/caddy-defender/pull/139", "tags": ["x_refsource_MISC"], "url": "https://github.com/JasonLovesDoggo/caddy-defender/pull/139"}, {"name": "https://caddyserver.com/docs/caddyfile/matchers#client-ip", "tags": ["x_refsource_MISC"], "url": "https://caddyserver.com/docs/caddyfile/matchers#client-ip"}, {"name": "https://caddyserver.com/docs/caddyfile/options#trusted-proxies", "tags": ["x_refsource_MISC"], "url": "https://caddyserver.com/docs/caddyfile/options#trusted-proxies"}], "affected": [{"vendor": "JasonLovesDoggo", "product": "caddy-defender", "versions": [{"version": "< 0.10.1", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-07-20T15:05:21.961Z"}, "descriptions": [{"lang": "en", "value": "The Caddy Defender plugin is a middleware for Caddy that allows users to block or manipulate requests based on the client's IP address. Prior to version 0.10.1, Caddy Defender used `r.RemoteAddr` when evaluating whether a request should be blocked. `RemoteAddr` is the address of the immediate peer connected to Caddy. In deployments where Caddy is behind a trusted proxy, CDN, or load balancer, the immediate peer is usually the proxy, not the original client. Caddy resolves the original client address into its `client_ip` request variable after applying the configured `trusted_proxies` policy, but Defender did not use that value. As a result, clients from blocked IP ranges could bypass Defender when accessing Caddy through a trusted proxy whose own IP address was not blocked. This affects deployments that use Defender behind trusted proxies and expect it to enforce blocking based on the real client IP. The issue is fixed in version 0.10.1 by making Defender prefer Caddys resolved `client_ip` request variable when it is available. Defender falls back to `RemoteAddr` only when Caddy has not provided a resolved client IP. There is no complete workaround in affected Defender versions for deployments that rely on Caddy's trusted proxy client IP resolution. Until upgrading, affected users should enforce equivalent IP blocking at the trusted proxy, CDN, load balancer, firewall, or other edge layer before traffic reaches Caddy. Deployments where Caddy receives traffic directly from clients, without an intermediate trusted proxy, are not affected by this bypass."}], "source": {"advisory": "GHSA-3h23-rrpc-3p87", "discovery": "UNKNOWN"}}, "adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-46415", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-21T13:52:55.935258Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-21T13:53:00.451Z"}}]}}

{"affected": [{"affectedData": [{"product": "caddy-defender", "vendor": "JasonLovesDoggo", "versions": [{"status": "affected", "version": "< 0.10.1"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The Caddy Defender plugin is a middleware for Caddy that allows users to block or manipulate requests based on the client's IP address. Prior to version 0.10.1, Caddy Defender used `r.RemoteAddr` when evaluating whether a request should be blocked. `RemoteAddr` is the address of the immediate peer connected to Caddy. In deployments where Caddy is behind a trusted proxy, CDN, or load balancer, the immediate peer is usually the proxy, not the original client. Caddy resolves the original client address into its `client_ip` request variable after applying the configured `trusted_proxies` policy, but Defender did not use that value. As a result, clients from blocked IP ranges could bypass Defender when accessing Caddy through a trusted proxy whose own IP address was not blocked. This affects deployments that use Defender behind trusted proxies and expect it to enforce blocking based on the real client IP. The issue is fixed in version 0.10.1 by making Defender prefer Caddys resolved `client_ip` request variable when it is available. Defender falls back to `RemoteAddr` only when Caddy has not provided a resolved client IP. There is no complete workaround in affected Defender versions for deployments that rely on Caddy's trusted proxy client IP resolution. Until upgrading, affected users should enforce equivalent IP blocking at the trusted proxy, CDN, load balancer, firewall, or other edge layer before traffic reaches Caddy. Deployments where Caddy receives traffic directly from clients, without an intermediate trusted proxy, are not affected by this bypass."}, {"lang": "es", "value": "El plugin Caddy Defender es un middleware para Caddy que permite a los usuarios bloquear o manipular solicitudes bas\u00e1ndose en la direcci\u00f3n IP del cliente. Antes de la versi\u00f3n 0.10.1, Caddy Defender utilizaba \u201cr.RemoteAddr\u201d al evaluar si una solicitud deb\u00eda ser bloqueada. \u201cRemoteAddr\u201d es la direcci\u00f3n del par inmediato conectado a Caddy. En implementaciones donde Caddy est\u00e1 detr\u00e1s de un proxy de confianza, CDN o balanceador de carga, el par inmediato suele ser el proxy, no el cliente original. Caddy resuelve la direcci\u00f3n del cliente original en su variable de solicitud \u201cclient_ip\u201d despu\u00e9s de aplicar la pol\u00edtica \u201ctrusted_proxies\u201d configurada, pero Defender no utilizaba ese valor. Como resultado, los clientes de rangos de direcci\u00f3n IP bloqueados pod\u00edan eludir a Defender al acceder a Caddy a trav\u00e9s de un proxy de confianza cuya propia direcci\u00f3n IP no estaba bloqueada. Esto afecta a las implementaciones que utilizan Defender detr\u00e1s de proxies de confianza y esperan que aplique el bloqueo bas\u00e1ndose en la direcci\u00f3n IP real del cliente. El problema se soluciona en la versi\u00f3n 0.10.1 haciendo que Defender prefiera la variable de solicitud \u201cclient_ip\u201d resuelta de Caddy cuando est\u00e9 disponible. Defender recurre a \u201cRemoteAddr\u201d solo cuando Caddy no ha proporcionado una direcci\u00f3n IP de cliente resuelta. No existe una soluci\u00f3n alternativa completa en las versiones afectadas de Defender para implementaciones que dependen de la resoluci\u00f3n de la direcci\u00f3n IP del cliente por parte del proxy de confianza de Caddy. Hasta la actualizaci\u00f3n, los usuarios afectados deben aplicar un bloqueo de direcci\u00f3n IP equivalente en el proxy de confianza, CDN, balanceador de carga, cortafuegos u otra capa perimetral antes de que el tr\u00e1fico llegue a Caddy. Las implementaciones donde Caddy recibe tr\u00e1fico directamente de los clientes, sin un proxy de confianza intermedio, no se ven afectadas por esta elusi\u00f3n."}], "id": "CVE-2026-46415", "lastModified": "2026-10-24T20:10:00.137", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 8.2, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 4.2, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-46415", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-07-21T13:52:55.935258Z", "version": "2.0.3"}}]}, "published": "2026-07-20T16:17:01.163", "references": [{"source": "security-advisories@github.com", "url": "https://caddyserver.com/docs/caddyfile/matchers#client-ip"}, {"source": "security-advisories@github.com", "url": "https://caddyserver.com/docs/caddyfile/options#trusted-proxies"}, {"source": "security-advisories@github.com", "url": "https://github.com/JasonLovesDoggo/caddy-defender/pull/139"}, {"source": "security-advisories@github.com", "url": "https://github.com/JasonLovesDoggo/caddy-defender/security/advisories/GHSA-3h23-rrpc-3p87"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-284"}, {"lang": "en", "value": "CWE-348"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,0.10.1)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "caddy-defender", "source": "cna", "vendor": "JasonLovesDoggo"}, "product": "caddy-defender", "vendor": "jasonlovesdoggo"}], "created": "2026-07-21T20:45:03.261682+00:00", "updated": "2026-07-30T19:30:09.695244+00:00", "vendors": ["jasonlovesdoggo", "jasonlovesdoggo$PRODUCT$caddy-defender"]}