v3.26.1
Document And Entity Information - shares
 6 Months Ended
Jun. 30, 2026
Aug. 13, 2026
Document Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Transition Report false  
Entity Interactive Data Current No  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Document Period End Date Jun. 30, 2026  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q2  
Entity Registrant Name Quantum Cyber N.V.  
Entity Central Index Key 0001874252  
Entity File Number 001-41010  
Entity Tax Identification Number 00-0000000  
Entity Incorporation, State or Country Code P7  
Entity Current Reporting Status Yes  
Entity Shell Company false  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Address, Address Line One 200 Connecticut Ave. Suite 400  
Entity Address, City or Town Norwalk  
Entity Address, State or Province CT  
Entity Address, Postal Zip Code 06854  
City Area Code +1 (203)  
Local Phone Number 851-1599  
Entity Common Stock, Shares Outstanding   84,068,192