v3.26.1
Cover - USD ($)
 12 Months Ended
Dec. 31, 2025
Mar. 20, 2026
Jun. 30, 2025
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2025    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 001-40366    
Entity Registrant Name WEREWOLF THERAPEUTICS, INC.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 82-3523180    
Entity Address, Address Line One 200 Talcott Ave    
Entity Address, Address Line Two 2nd Floor    
Entity Address, City or Town Watertown    
Entity Address, State or Province MA    
Entity Address, Postal Zip Code 02472    
City Area Code 617    
Local Phone Number 952‑0555    
Title of 12(b) Security Common Stock, $0.0001 par value per share    
Trading Symbol HOWL    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company true    
Entity Ex Transition Period true    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction false    
Entity Shell Company false    
Entity Public Float     $ 39,559,339
Entity Common Stock, Shares Outstanding   48,596,817  
Documents Incorporated by Reference None    
Entity Central Index Key 0001785530    
Document Fiscal Year Focus 2025    
Document Fiscal Period Focus FY    
Amendment Flag false