web3radar · monthly intelligence digest
Arbitrum
July 2026
Ethereum · Monitoring since 2021-08-31 · Ranked #8 of 12 monitored chains by activity this month
Executive summary
For Arbitrum in July 2026, 1 security incident was published, with $18.00M in reported losses.
Security incidents
1
+1 MoM
Total loss reported
$18.00M
+$18.00M MoM
Staking events
0
Slashing-class
0
Notable security incidents
1 published this month
- Ostium2026-07-15Ostium · OTHER · $18.00M loss · Root cause: oracle_manipulation
Validator-set health
0 staking events · 0 slashing-class
No staking events recorded on Arbitrum during July 2026. Validator set was clean.
Peer benchmark
Among 12 chains web3radar monitored in July 2026
Arbitrum ranked #8 of 12 monitored chains by combined incident + staking event volume this month. Below the median for activity volume this month.