Hack history / 2026 / Hack or exploit

TAC Protocol

Hack or exploit on May 11, 2026 · Proof Verifier Bug

SOURCES AGREE ON DATE AND LOSS · 3 SOURCES

Lost

$2.9M

dollars at the time

Returned

none listed

as the sources state it

Rank

#609

among thefts by dollars lost

What happened

The TON-TAC bridge lacked code-hash verification on jetton wallets. An attacker deployed a counterfeit USD₮ wallet and sent a fraudulent bridge message to receive unbacked minted TAC tokens, draining legitimate locked assets.

Details

Date: May 11, 2026
Kind: Hack or exploit
Method: Proof Verifier Bug
How in: Bridge and cross-chain
Target: DeFi protocol
Chains: TON, TAC, Ethereum

Reported by

DefiLlama ↗
SlowMist Hacked ↗
Web3 Is Going Great ↗

Related incidents

Vara Bridge 2026 · Hack or exploit · $13K
Veil Cash 2026 · Hack or exploit · $5K

Cite this page

SwanBluechip, "TAC Protocol hack, May 11, 2026: $2.9M lost", Crypto hack history, https://swan-hack-tracker.pages.dev/history/i/ht2869ccfa6c/ (data as of 2026-11-01).

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