Hack history / 2026 / Hack or exploit
Kipseli
Hack or exploit on Apr 21, 2026 · Missing Input Validation
ATTACK TX CONFIRMED ON CHAINSOURCES AGREE ON DATE AND LOSS · 3 SOURCES
Lost
$72K
dollars at the time
Returned
none listed
as the sources state it
Rank
#1,828
among thefts by dollars lost
What happened
On April 22, 2026, an MEV bot exploited Kipseli's PropAMM Router on Base via a denomination/decimals mismatch in the quote logic, swapping 0.04 WETH for 0.926 cbBTC worth ~$72.35K.
Details
- Date
- Apr 21, 2026
- Kind
- Hack or exploit
- Method
- Missing Input Validation
- How in
- Smart contract bug
- Target
- DeFi protocol
- Chains
- Base
After the theft
- Bounty paid
- yes, amount not stated
“Afterward, the finder contacted the team, returned 80% of the funds as a white-hat disclosure, and kept 20% as a bug bounty.” (SlowMist Hacked)
Reported by
Related incidents
Cite this page
SwanBluechip, "Kipseli hack, Apr 21, 2026: $72K lost", Crypto hack history, https://swan-hack-tracker.pages.dev/history/i/hte3f3238e6e/ (data as of 2026-10-31).