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Backslash Vulnerability Database

Path Equivalence: '/multiple//internal/slash'

Path Equivalence: '/multiple//internal/slash'

CWE-51

Short description

The product accepts path input in the form of multiple internal slash ('/multiple//internal/slash/') without appropriate validation, which can lead to ambiguous path resolution and allow an attacker to traverse the file system to unintended locations or access arbitrary files.

Best practices to prevent this CWE

Phase: Implementation

Strategy: Input Validation

Inputs should be decoded and canonicalized to the application's current internal representation before being validated (CWE-180). Make sure that the application does not decode the same input twice (CWE-174). Such errors could be used to bypass allowlist validation schemes by introducing dangerous inputs after they have been checked.

Prioritize and Uncover Reachable Vulnerabilities in Your Application Code

Identify externally reachable data flows and vulnerabilities for effective risk mitigation

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