/**
 * Escapes HTML-reserved characters to their entity equivalents.
 *
 * @param input - The string to escape.
 * @returns The escaped string with HTML-sensitive characters replaced.
 *
 * Special behavior: Escapes `&`, `<`, `>`, `"`, and `'` characters; does not decode entities.
 */
export declare function escapeHTML(input: string): string;
/**
 * Escapes SQL-sensitive characters by prefixing them with a backslash.
 *
 * @param input - The string to escape.
 * @returns The escaped string with `'`, `"`, `;`, and `\` prefixed by `\`.
 *
 * Special behavior: Simple escaping helper; it does not validate SQL or prevent all injection cases.
 */
export declare function escapeSQL(input: string): string;
/**
 * Sanitizes a path-like string by removing traversal and dot segments.
 *
 * @param input - The path string to sanitize.
 * @returns The sanitized path with `.` and `..` segments removed.
 *
 * Special behavior: Preserves a leading separator and normalizes repeated separators.
 */
export declare function sanitizePath(input: string): string;
//# sourceMappingURL=security.d.ts.map