CVE-2023-47106 (GCVE-0-2023-47106)
Vulnerability from cvelistv5
Published
2023-12-04 20:26
Modified
2024-08-02 21:01
CWE
  • CWE-20 - Improper Input Validation
Summary
Traefik is an open source HTTP reverse proxy and load balancer. When a request is sent to Traefik with a URL fragment, Traefik automatically URL encodes and forwards the fragment to the backend server. This violates RFC 7230 because in the origin-form the URL should only contain the absolute path and the query. When this is combined with another frontend proxy like Nginx, it can be used to bypass frontend proxy URI-based access control restrictions. This vulnerability has been addressed in versions 2.10.6 and 3.0.0-beta5. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Impacted products
Vendor Product Version
traefik traefik Version: < 2.10.6
Version: >= 3.0.0-beta1, < 3.0.0-beta5
Create a notification for this product.
Show details on NVD website


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          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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        "references": [
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            "name": "https://github.com/traefik/traefik/security/advisories/GHSA-fvhj-4qfh-q2hm",
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            "url": "https://github.com/traefik/traefik/releases/tag/v3.0.0-beta5"
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        "title": "CVE Program Container"
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    "cna": {
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          "vendor": "traefik",
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          "value": "Traefik is an open source HTTP reverse proxy and load balancer. When a request is sent to Traefik with a URL fragment, Traefik automatically URL encodes and forwards the fragment to the backend server. This violates RFC 7230 because in the origin-form the URL should only contain the absolute path and the query. When this is combined with another frontend proxy like Nginx, it can be used to bypass frontend proxy URI-based access control restrictions. This vulnerability has been addressed in versions 2.10.6 and 3.0.0-beta5. Users are advised to upgrade. There are no known workarounds for this vulnerability."
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      "metrics": [
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          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 4.8,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N",
            "version": "3.1"
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          "descriptions": [
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              "description": "CWE-20: Improper Input Validation",
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      "providerMetadata": {
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        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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          "name": "https://github.com/traefik/traefik/releases/tag/v2.10.6",
          "tags": [
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          "url": "https://github.com/traefik/traefik/releases/tag/v2.10.6"
        },
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        "advisory": "GHSA-fvhj-4qfh-q2hm",
        "discovery": "UNKNOWN"
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      "title": "Incorrect processing of fragment in the URL leads to Authorization Bypass in Traefik"
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    "dateReserved": "2023-10-30T19:57:51.673Z",
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