Document And Entity Information	Mar. 27, 2025
Document Information [Line Items]
Document Type	8-K
Amendment Flag	false
Document Period End Date	Mar. 27, 2025
Entity Registrant Name	Kyverna Therapeutics, Inc.
Entity Central Index Key	0001994702
Entity Emerging Growth Company	true
Entity File Number	001-41947
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	83-1365441
Entity Address, Address Line One	5980 Horton St., STE 550
Entity Address, City or Town	Emeryville
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94608
City Area Code	(510)
Local Phone Number	925-2492
Entity Information, Former Legal or Registered Name	N/A
Written Communications	false
Soliciting Material	false
Pre-commencement Tender Offer	false
Pre-commencement Issuer Tender Offer	false
Entity Ex Transition Period	false
Title of 12(b) Security	Common Stock, par value $0.00001 per share
Trading Symbol	KYTX
Security Exchange Name	NASDAQ
Former Address [Member]
Document Information [Line Items]
Entity Address, Address Line One