The product does not properly handle when a leading character or sequence ("leader") is missing or malformed, or if multiple leaders are used when only one should be allowed.
View on MITREDevelopers should anticipate that leading characters will be injected/removed/manipulated in the input vectors of their product. Use an appropriate combination of denylists and allowlists to ensure only valid, expected and appropriate input is processed by the system.
No detection method information available for this CWE.
No examples or observed CVEs available for this CWE.
CWE-148: Improper Neutralization of Input Leaders is a Common Weakness Enumeration (CWE) entry maintained by MITRE. The product does not properly handle when a leading character or sequence ("leader") is missing or malformed, or if multiple leaders are used when only one should be allowed.
If exploited, CWE-148 (Improper Neutralization of Input Leaders) it can compromise Integrity, leading to outcomes such as Unexpected State.
Recommended mitigations for CWE-148 include: Developers should anticipate that leading characters will be injected/removed/manipulated in the input vectors of their product. Use an appropriate combination of denylists and allowlists to ensure only valid, expected and appropriate input is processed by the system.
A CWE (Common Weakness Enumeration) like CWE-148 describes a category of software weakness — the underlying flaw type. A CVE (Common Vulnerabilities and Exposures) identifies a specific, real-world vulnerability in a particular product. In short, a CWE is the kind of mistake, and a CVE is an instance of that mistake being found in software.