Onyx Protocol exploit on 2023-11-01 ($2.1M reported)
Exploit on Ethereum, 1 Nov 2023. Reported loss $2.1M. Last verified 4 Nov 2026.
notable
Reported loss
$2.1M
as reported by the sources
Recovered
-
nothing reported
Status
Unknown
updated 26 Oct 2026
Date
Ethereum
Summary
On 2023-11-01 the Ethereum lending protocol Onyx Protocol was exploited through its newly listed oPEPE market via a rounding bug, causing a protocol loss of about $2.1m to its lending markets; the team proposed selling XCN from the DAO treasury to compensate users.
- Protocol
- Onyx Protocol
- Type
- Exploit
- Reported loss
- $2,100,000 source: community.onyx.org ↗
Facts and where they come from
| Fact | Value | Source |
|---|---|---|
| Date | November 1, 2023 | community.onyx.org ↗ |
| Amount (USD) | ~$2.1m | community.onyx.org ↗ |
| Response | sell XCN from the DAO treasury to compensate | community.onyx.org ↗ |
Primary sources
- Onyx Community forum: The OnyxProtocol experienced an exploit ↗ official announcement · accessed 2026-11-04
- Onyx Community forum: Recovery Proposal 1 of 3 (team) ↗ governance post · accessed 2026-11-04
Our own summary of facts published by the sources above. We do not attribute fault beyond them. Amounts are as the sources state them (no USD conversion by us); links and quoted figures last checked 2026-11-04.
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