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Weakness (CWE)

CWE-647: Use of Non-Canonical URL Paths for Authorization Decisions

Variant Incomplete

The product defines policy namespaces and makes authorization decisions based on the assumption that a URL is canonical.

More detail

If an application defines policy namespaces and makes authorization decisions based on the URL, but it does not require or convert to a canonical URL before making the authorization decision, then it opens the application to attack. For example, if the application only wants to allow access to http://www.example.com/mypage, then the attacker might be able to bypass this restriction using equivalent URLs such as:

- http://WWW.EXAMPLE.COM/mypage

- http://www.example.com/%6Dypage (alternate encoding)

- http://192.168.1.1/mypage (IP address)

- http://www.example.com/mypage/ (trailing /)

- http://www.example.com:80/mypage

How to prevent it (1 mitigation)

  1. Architecture and Design

    Make access control policy based on path information in canonical form, with all alternate encodings rejected (which can be accomplished by a default deny rule). Consider very restrictive regular expressions to validate that the path is in the expected form. Reject all alternate path encodings that are not in the expected canonical form.

Source: MITRE CWE-647

All Critical High Medium Low Exploited only Public exploit

6 results · Clear filters · Feed

  • High 8.8
    CVE-2026-76530

    Use of Non-Canonical URL Paths for Authorization Decisions in Splunk SOAR

    As part of Cisco's ongoing commitment to proactive security and product quality, Cisco has conducted a comprehensive internal security review. This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities. …

    Splunk Splunk SOAR
  • High 8.9
    CVE-2026-80515

    In Eclipse Arrowhead versions from 5.0.0 to 5.2.1 the management-authorization gate that protects every /…/mgmt/… REST …

    Eclipse Foundation Eclipse Arrowhead
  • High 8.1
    CVE-2026-62685

    File Browser: Colliding username normalization gives two users the same home directory

    File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Prior to 2.63.17, File Browser builds new user scopes from usernames passed through cleanUsername() when Signup=true and C…

    filebrowser filebrowser github.com/filebrowser/filebrowser/v2 github.com/filebrowser/filebrowser Go
  • High 8.2
    CVE-2026-59731

    Astro 6.4.7 Authorization Bypass via Decode Iteration Limit and Rewrite Path Canonicalization Mismatch

    Astro is a web framework for content-driven websites. Version 6.4.7 performs authorization decisions on a partially decoded pathname after reaching the iterative URL decoder limit, while later rewrite route matching performs an additional decodeURI() operatio…

    withastro astro astro npm
  • High 7.3
    CVE-2025-64500

    Symfony's incorrect parsing of PATH_INFO can lead to limited authorization bypass

    Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Symfony's HttpFoundation component defines an object-oriented layer for the HTTP specification. Starting in version 2.0.0 and prior to version 5.4.50, 6.4.29, an…

    symfony symfony symfony/symfony symfony Debian Ubuntu Packagist
  • High 8.6
    CVE-2022-43939 Exploited Public exploit EPSS 92%

    Hitachi Vantara Pentaho Business Analytics Server - Use of Non-Canonical URL Paths for Authorization Decisions

    Hitachi Vantara Pentaho Business Analytics Server versions before 9.4.0.1 and 9.3.0.2, including 8.3.x contain security restrictions using non-canonical URLs which can be circumvented.

    Hitachi Vantara Pentaho Business Analytics Server
    KEV Mar 3, 2025