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Weakness (CWE)

CWE-179: Incorrect Behavior Order: Early Validation

Base Incomplete

The product validates input before applying protection mechanisms that modify the input.

How to prevent it (1 mitigation)

  1. Implementation

    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.

Source: MITRE CWE-179

All Critical High Medium Low Exploited only Public exploit

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