10/31/2025 | Press release | Archived content
Quarterly report [Sections 13 or 15(d)]
Document and Entity Information
|
Document and Entity Information - shares
|
9 Months Ended | |
|---|---|---|
| Cover [Abstract] | ||
| Document Type | 10-Q | |
| Amendment Flag | false | |
| Document Period End Date | Sep. 30, 2025 | |
| Document Fiscal Year Focus | 2025 | |
| Document Fiscal Period Focus | Q3 | |
| Trading Symbol | CABA | |
| Entity Registrant Name | CABALETTA BIO, INC. | |
| Entity Current Reporting Status | Yes | |
| Entity Central Index Key | 0001759138 | |
| Current Fiscal Year End Date | --12-31 | |
| Entity Filer Category | Non-accelerated Filer | |
| Entity Shell Company | false | |
| Entity Small Business | true | |
| Entity Emerging Growth Company | false | |
| Entity Common Stock, Shares Outstanding | 96,265,204 | |
| Entity File Number | 001-39103 | |
| Entity Tax Identification Number | 82-1685768 | |
| Entity Address, Address Line One | 2929 Arch Street | |
| Entity Address, Address Line Two | Suite 600 | |
| Entity Address, City or Town | Philadelphia | |
| Entity Address, State or Province | PA | |
| Entity Address, Postal Zip Code | 19104 | |
| City Area Code | 267 | |
| Local Phone Number | 759-3100 | |
| Entity Interactive Data Current | Yes | |
| Title of 12(b) Security | Common Stock, par value $0.00001 per share | |
| Security Exchange Name | NASDAQ | |
| Entity Incorporation, State or Country Code | DE | |
| Document Quarterly Report | true | |
| Document Transition Report | false |