advancedSecuring Exceptions & Custom Errors
Why can leaking a raw exception message in a security error response be dangerous?
A raw stack trace or exception message can reveal internal details — class names, SQL fragments, whether a username exists at all (letting an attacker enumerate valid accounts by comparing 'user not found' vs 'wrong password' responses). Production error handlers should return a generic, consistent message for authentication failures regardless of the specific internal cause.
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