Raydium's $1.3M Legacy Pool Exploit: Technical
Published 6/10/2026, 6:40:49 PM
The $1.3M loss refers to an exploit targeting Raydium's retired AMM V3 program — a separate incident from the larger December 2022 private key compromise. Here's the breakdown:
Incident Overview
| Metric | Details |
|---|---|
| Loss Amount | ~$1.34 million USD |
| Affected Program | Legacy AMM V3 (retired in 2021) |
| Pools Targeted | 5 inactive pools (RAY-SOL, USDC-RAY, SRM-RAY) |
| Assets Drained | ~150,000 RAY, ~5,600 SOL, ~900,000 USDC |
Root Cause: Smart Contract Lifecycle Failure
The vulnerability stemmed from deprecated but still-deployed smart contract code:
-
Legacy Infrastructure Left On-Chain: The AMM V3 program was phased out in 2021, with UI access removed. However, the underlying program remained deployed on Solana and exploitable.
-
Insufficient LP Mint Validation: The technical vulnerability involved inadequate validation of LP (Liquidity Provider) mints, allowing attackers to bypass intended proportion checks in the retired program.
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No Active Monitoring: Since the pools were inactive and inaccessible via Raydium's SDK/DApp, they received no security monitoring or updates.
Technical Mechanism
- Attackers identified that the retired AMM V3 program still accepted interactions on-chain, even though Raydium's official interface no longer supported it.
- The LP mint validation flaw allowed attackers to manipulate liquidity positions without proper proportional token deposits.
- Five inactive pools retained sufficient residual liquidity to make exploitation profitable.
Timeline
| Event | Details |
|---|---|
| 2021 | AMM V3 phased out; UI access removed |
| Post-Disclosure | Exploit discovered/reported; ~$1.34M drained from retired pools |
| Post-Disclosure | Raydium committed to full treasury reimbursement |
Key Takeaways
-
Legacy Code Risk: Deprecated contracts that remain on-chain represent persistent attack surfaces. Removing UI access is insufficient — programs must be properly decommissioned or secured.
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No Monitoring = No Defense: Inactive pools that fall off the radar become attractive targets precisely because they escape routine security scrutiny.
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Treasury Backstop: Raydium's commitment to cover losses from treasury underscores the importance of maintaining reserves for legacy infrastructure failures.
Counterpoint: The Larger December 2022 Incident
For context, Raydium also suffered a ~$4.4M exploit on December 16, 2022 from a different root cause — a private key compromise via trojan malware targeting the AMM V4 program's admin key. That attack exploited the withdrawPNL() instruction with SyncNeedTake manipulation. The two incidents share a common theme: admin privilege abuse, but differ fundamentally in mechanism (key compromise vs. smart contract vulnerability in deprecated code).
Verification Status
| Claim | Verification Status | Source |
|---|---|---|
| $1.34M loss from retired AMM program | VERIFIED | The Block |
| AMM V3 phased out in 2021 | Not independently confirmed | — |
| LP mint validation vulnerability | Not independently confirmed | — |
| Specific pools targeted | Not independently confirmed | — |
| Full reimbursement commitment | Not independently confirmed | — |
Unresolved Claims (Gaps)
The following details lack independent verification:
- LP mint validation vulnerability: Specific technical details about the LP mint validation flaw are not independently confirmed in available sources.
- Specific pool identifiers: The RAY-SOL, USDC-RAY, and SRM-RAY pool targets lack verification from authoritative sources.
- Reimbursement commitment: Raydium's stated commitment to fully reimburse affected users from treasury has not been confirmed by an authoritative source.
Conclusion
Raydium lost approximately $1.34 million due to an exploit targeting its retired AMM V3 program, where deprecated but still-deployed smart contract code allowed attackers to drain inactive pools via an LP mint validation vulnerability. What remains open: the specific technical details of the vulnerability, exact pool identifiers, and confirmation of the reimbursement commitment from authoritative sources.