VERDICT —UNRATED
Verdict pending. Auto-ingested incidents are reviewed before a public verdict is rendered.
Root cause
Root-cause analysis not yet published. The incident description below contains all currently available signal — review the attack transaction directly for definitive forensics.
▰ PROOF OF CONCEPT
DEFIHACKLABS
src/test/2021-08/PolyNetwork_exp.sol
view forked test on github ↗Reproducible Foundry test fork from SunWeb3Sec/DeFiHackLabs. Clone the repo, run forge test against the file path above, and replay the exploit against a mainnet fork at the historical block. Use for reproduction only — not for live targets.
Forensic narrative
The profit farming agreement PolyYeld Finance was attacked. The project contract was used to mint 4.9 trillion YELD tokens and dump them in the secondary market. Attack method (per SlowMist): Compatibility Issue. Reported loss: 4,900,000,000,000 YELD.
Sourced from
slowmist
Technical record
- chain
- —
- protocol
- PolyYeld Finance
- bug_class
- logic
- date_occurred
- 2021-07-28
- loss_usd
- —
- source_id
- sm:polyyeld-finance::2021-07-28
Related — same bug class· logic