We found a critical auth bypass in @better_auth, one of the most popular auth libraries in 2026 with over 9.5 million weekly downloads.
CVSS 9.1. Fixed in Better Auth 1.7.7
PoC below 👇
A status-only API token exposed wallet admin keys after a cache hit.
Approved PayPal orders treated as complete but never captured, allowing unbacked spend.
V12 found both bugs in @lnbits, widely used software for Bitcoin Lightning wallets.
Patched in v1.6.0. Upgrade now. 🧵