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CWE - 777 : Regular Expression without Anchors

CWE Definition http://cwe.mitre.org/data/definitions/777.html
Number of vulnerabilities: 0
Description The software uses a regular expression to perform sanitization, but the regular expression is not anchored and may allow malicious or malformed data to slip through.When performing tasks such as whitelist validation, data is examined and possibly modified to ensure that it is well-formed and adheres to a list of safe values. If the regular expression is not anchored, malicious or malformed data may be included before or after any string matching the regular expression. The type of malicious data that is allowed will depend on the context of the application and which anchors are omitted from the regular expression.
Background Details Regular expressions are typically used to match a pattern of text. Anchors are used in regular expressions to specify where the pattern should match: at the beginning, the end, or both (the whole input).
Other Notes

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