LDAP Injection Pattern Regex for Go

What this pattern does

This page provides a comprehensive, battle-tested regular expression for matching ldap injection pattern, ported and verified for Go. In security-sensitive code, using an unverified regex can open the door to both false positives and denial-of-service attacks. The snippet below is ready to drop into your Go project — whether you're validating in a Gin handler, a gRPC service, or a command-line tool.

Go Implementation

// LDAP Injection Pattern
// ReDoS-safe | RegexVault — Security > Injection Patterns

package validation

import "regexp"

var ldapInjectionPatternRe = regexp.MustCompile(`[)(|*\\\x00]|(?:objectclass|objectCategory|objectGUID|samAccountName|userPrincipalName|memberOf)\s*=|(?:\(uid=)|(?:cn=)(?:[^,)]*\*)`)

func ValidateLdapInjectionPattern(s string) bool {
    return ldapInjectionPatternRe.MatchString(s)
}

// Example
// fmt.Println(ValidateLdapInjectionPattern("*)(uid=*))(|(uid=*")) // true

Test Cases

When to use this pattern

This pattern is drawn from the Security > Injection Patterns category and carries a ReDoS-safe certification. That matters for Go developers because Go's RE2 engine is inherently safe from catastrophic backtracking, but this pattern has been additionally verified for correctness. RegexVault audits patterns against known backtracking attack vectors, ensuring you have the necessary context before using this regex in a high-stakes production environment.

Common Pitfalls

Technical Notes

LDAP special characters: ( ) * \ and null byte. Classic injection: *(|(mail=*)) returns all records when injected into a filter. Defense: use LDAP parameter encoding to escape special characters in search filters. RFC 4515 defines the escape sequences.