Home/CWE/Improper Handling of Syntactically Invalid Structure
Weakness

Improper Handling of Syntactically Invalid Structure

CWE-228 · Class · Incomplete

The product does not handle or incorrectly handles input that is not syntactically well-formed with respect to the associated specification.

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Weakness Relationships

Where this weakness sits in the CWE hierarchy. Walk up to broader classes or down to more specific variants.
Parent of this (broader)
ChildOfCWE-703 · Improper Check or Handling of Exceptional Conditions
ChildOfCWE-707 · Improper Neutralization
Children (more specific)
ParentOfCWE-166 · Improper Handling of Missing Special Element
ParentOfCWE-167 · Improper Handling of Additional Special Element
ParentOfCWE-168 · Improper Handling of Inconsistent Special Elements
ParentOfCWE-229 · Improper Handling of Values
ParentOfCWE-233 · Improper Handling of Parameters
ParentOfCWE-237 · Improper Handling of Structural Elements
ParentOfCWE-241 · Improper Handling of Unexpected Data Type
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CVEs With This Weakness

16
A sample of the 16 CVEs tagged with this weakness.
CVECVE-2026-34232
CVECVE-2026-20125
CVECVE-2025-47736
CVECVE-2025-2529
CVECVE-2025-0343
CVECVE-2024-6382
CVECVE-2024-55594
CVECVE-2024-53828
CVECVE-2024-22815
CVECVE-2024-22809
CVECVE-2024-21612
CVECVE-2023-42784
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