Web3 Security Weekly News Review — September 28–October 4, 2026
A vault with no named owner lost $6M to a whitelist entry, a swap protocol got its $3.8M back in 36 hours with a public ultimatum, and the exchange breached for $387.5M finished…
Articles tagged Smart Contracts
A vault with no named owner lost $6M to a whitelist entry, a swap protocol got its $3.8M back in 36 hours with a public ultimatum, and the exchange breached for $387.5M finished…
The series snapped back 40x after the Bitget week — and every dollar of it sat in the glue: an allowlist, a Safe module, a hook's shared unlock, a deposit rail. Not one core…
Every dollar lost this week sat in the glue — an allowlist, a Safe module, a hook, a deposit rail — and for the first time in this column's coverage, a public ultimatum brought…
Nothing was hacked — a permission list was edited, correctly, by whoever holds the keys. The vault's math was fine; the answer to 'who can change who can borrow' was 'seven people…
A $20K governance vote took over a chain's applications, an exchange lost $387.5M without a single private key being stolen, and the costliest month of 2026 got that way in seven…
The week's losses came from the layer above the keys: an exchange backend that could forge transactions, a governance process that could reassign contract admins, and a rollup…
Nothing was hacked. A governance proposal did exactly what governance proposals can do — and that was the vulnerability. The contracts worked as written; the vote was the attack.
The week's largest loss needed no exploit at all: a list of keys, an app that kept signing with them, and six days in which nobody stopped it. The rest of the damage came from an…
The wallet's cryptography was never broken. A module the owner had already whitelisted accepted instructions from anyone, moved a $7.7M position, and then lost the proceeds to a…
A quiet dollar week with a loud pattern: three unbacked-mint failures on Bitcoin wrappers in six days, two settlement-layer checks that were never made, plus Tether's $39.27M…
The smallest dollar week this site has recorded, on a net basis down 91% — but three unbacked-mint failures in six days, and two settlement-layer checks that were never made, make…
A quiet dollar week with a structural alarm: three wrapper backing failures in six days, and a freeze pipeline operating at nearly eight times the week's crime total.
The third unbacked-mint failure in six days — and the clearest demonstration that a wrapper's true loss ceiling is its exit liquidity, not its mint logic.
The largest Bitcoin-sidechain incident of the year defines the week: 3,998.5 unbacked L-BTC minted via a cache-key collision, pegged out within minutes, mostly returned on-chain…
A dual-basis report: the largest single event of the year ($320M gross, ~$272M returned) sits on top of a busy protocol tail (~$11.6M).
The week's theme is trust in computed verdicts: cached proofs, collided identifiers and forged claims all let a protocol accept something it should have checked.
10 events; ~$33.8M realized; two price-manipulation lending attacks define the week and the month — plus a chain rollback that reversed $111.2M.
~$33.8M realized losses across 9 loss events (plus one data breach tracked separately), up 52% week-over-week; price manipulation dominates and a rollback changed what the…
Price manipulation is August's method, consensus-level rollback is the new containment tool, and the ecosystem's response to thin-collateral lending has not caught up.
The month's largest event is a liquidity story dressed as a price story: a thin token, an unadjusted collateral factor, and a chain willing to roll back.
9 whitelist-sourced events; ~$22.2M realized losses; a $8.5M governance takeover takes the headline while a shared-infrastructure bug spreads across six Cosmos EVM chains.
~$22.2M realized losses across 9 events; top-3 concentration 77%; the week's shape is governance and shared infrastructure, not classic key theft.
Governance becomes an attack surface, a shared-infrastructure bug spreads across six chains, and a silent patch process turns a known bug into a countdown timer.
No code bug, no oracle game, no key leak: six Term Finance vaults were drained through their own governance after an attacker bought a near-empty electorate for roughly 0.5 ETH.