Base weakness
Incomplete
CWE-791: Incomplete Filtering of Special Elements
The product receives data from an upstream component, but does not completely filter special elements before sending it to a downstream component.
Last updated
22
Recorded CVEs
With this primary weakness
0
KEVs
In the CISA KEV catalog
Not rated
Likelihood of exploit
Per MITRE
Base
Abstraction
MITRE classification
Overview
CWE-791 (Incomplete Filtering of Special Elements) is a base-level software weakness catalogued by MITRE in the Common Weakness Enumeration (CWE). It describes a recurring type of mistake that can lead to exploitable security vulnerabilities.
Real-world CVEs
22 recorded CVEs are caused by CWE-791 (Incomplete Filtering of Special Elements). The highest-severity and most recent are shown first. 8 new CWE-791 CVEs have been recorded so far in 2026 (5 in 2025).