CVE-2023-47106

    Dashboard / Vulnerabilities / CVE-2023-47106

    CVE-2023-47106

    Published: 4 Dec 2023Last Modified: 21 Oct 2026

    Summary: Incorrect processing of fragment in the URL leads to Authorization Bypass in Traefik

    Details: 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.

    References: https://datatracker.ietf.org/doc/html/rfc7230#section-5.3.1, https://github.com/traefik/traefik/releases/tag/v2.10.6, https://github.com/traefik/traefik/releases/tag/v3.0.0-beta5, https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/47xxx/CVE-2023-47106.json, https://github.com/traefik/traefik/security/advisories/GHSA-fvhj-4qfh-q2hm, https://nvd.nist.gov/vuln/detail/CVE-2023-47106

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    3.0.0-beta1
    3.0.0-beta2
    3.0.0-beta3
    3.0.0-beta4

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High