On January 2026, Truebit suffered a integer overflow — the first of 5 documented integer overflow incidents in our archive where the loss figure was not publicly disclosed but the exploit pattern is documented below.
Attack Mechanics: How the Truebit Integer Overflow Played Out
Exploit Class Applied to Truebit
The Truebit incident on January 9, 2026 is classified as a Integer Overflow. Integer arithmetic wraps around, corrupting balances or allowances. In the full archive, Truebit is 1 of 5 documented integer overflow incidents.
Truebit in Context
The Truebit incident joins a class whose largest loss to date is SmartMesh (2018) at $140M.
Prior Integer Overflow Before Truebit
The nearest integer overflow incident before Truebit was – Poolz, 1031 days earlier on March 15, 2023 ($390K lost). The same exploit class surfaced again within the integer overflow attack surface.
Truebit Vulnerability Signature
The primary source categorises the Truebit exploit specifically as “OverFlow”. This narrower label is entity-specific: it reflects how the Truebit contract failed, rather than the broad integer overflow pattern alone.
Impact & Recovery for Truebit
Truebit Loss Figure
The loss figure for Truebit is not publicly disclosed. The primary source reports the exploit in non-USD terms, so no USD estimate is published here. For reference, the average loss across 5 integer overflow incidents in our archive is $35.1M.
Timeline Since the Truebit Incident
The Truebit exploit occurred 3 months ago (95 days). The contract, its fork-block, and the attack transaction remain on-chain and forensically reproducible.
Primary Reference for Truebit
Public post-mortem / on-chain analysis for the Truebit incident: view source.
FAQ
How much did Truebit lose?
The Truebit loss figure is not publicly disclosed. The primary source reports the exploit in non-USD token terms, so no USD estimate is published here.
When did the Truebit hack happen?
The Truebit exploit was recorded on January 9, 2026 — 95 days ago.
What type of exploit hit Truebit?
The Truebit incident is classified as a Integer Overflow. Integer arithmetic wraps around, corrupting balances or allowances.
How common is the Integer Overflow pattern seen at Truebit?
Our archive contains 5 documented integer overflow incidents. The Truebit incident is one of them.
How does Truebit compare to the largest Integer Overflow attack?
The largest integer overflow incident in our archive is SmartMesh (2018) at $140M. The Truebit loss was not publicly disclosed.
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