Hack history / 2026 / Hack or exploit
ONTR
Hack or exploit on May 28, 2026 · Ownership Takeover
SOURCES AGREE ON DATE AND LOSS · 2 SOURCES
Lost
$98K
dollars at the time
Returned
none listed
as the sources state it
Rank
#1,731
among thefts by dollars lost
What happened
When ONTR's creator renounced ownership to signal trustworthiness, the onlyOwner modifier contained a flawed require statement that treated owner == address(0) as permission rather than denial. This turned the ownership renunciation into a backdoor, allowing anyone to reclaim ownership and drain the contract of $98.2K in funds within minutes.
Details
- Date
- May 28, 2026
- Kind
- Hack or exploit
- Method
- Ownership Takeover
- How in
- Smart contract bug
- Target
- Token
- Chains
- Ethereum
Reported by
Related incidents
Cite this page
SwanBluechip, "ONTR hack, May 28, 2026: $98K lost", Crypto hack history, https://swan-hack-tracker.pages.dev/history/i/ht5b4ba4589b/ (data as of 2026-11-01).