H-7: claimAccountRewards pays MORPHO the users rewards

Source & credit. Reproduction of a public audit finding curated by AuditVault — the original finding: 62488-h-7-rewardmanagermixinclaimaccountrewards-lacks-of-necessary. Standalone Foundry PoC and full write-up: 62488-h-7-rewardmanagermixinclaimaccountrewards-lacks-of-necessary_exp in the evm-hack-registry mirror.

Field	Value
Protocol	Notional Exponent
Severity	high
Source	AuditVault / https://github.com/sherlock-audit/2025-06-notional-exponent-judging
Harm	100 reward tokens stolen to MORPHO address via permissionless claimAccountRewards

TL;DR#

100 reward tokens stolen to MORPHO address via permissionless claimAccountRewards

Vulnerable code#

See the synthetic reproduction in test/62488-h-7-rewardmanagermixinclaimaccountrewards-lacks-of-necessary.sol — the blamed line is marked // @> VULN.

Root cause#

Faithful reduction of the AuditVault finding. The vulnerable line is preserved so the Playground locator points at the real bug, not scaffolding.

Attack walkthrough#

Deploy the reduced protocol pieces via the Exploit constructor.
run() performs the attack end-to-end and requires the harm.

Diagrams#

sequenceDiagram participant A as Attacker participant V as Vulnerable participant T as Target A->>V: trigger vulnerable path V->>V: @> VULN line executes V->>T: harm materializes A->>A: assert harm

Impact#

100 reward tokens stolen to MORPHO address via permissionless claimAccountRewards

Taxonomy#

severity/high
sector/farm
platform/auditvault

Sources#

AuditVault finding: https://github.com/Auditware/AuditVault/blob/main/findings/62488-h-7-rewardmanagermixinclaimaccountrewards-lacks-of-necessary.md
Original report: https://github.com/sherlock-audit/2025-06-notional-exponent-judging
Reduced from: sherlock-audit/2025-06-notional-exponent@82c87105 (RewardManagerMixin.claimAccountRewards)

Sources & further analysis#

Reproductions & code

Standalone PoC + full trace: 62488-h-7-rewardmanagermixinclaimaccountrewards-lacks-of-necessary_exp (evm-hack-registry mirror).
AuditVault finding: 62488-h-7-rewardmanagermixinclaimaccountrewards-lacks-of-necessary.

Alerts & third-party analyses

Web3Sec X hacked database: search.
Rekt leaderboard: search.
Solodit incident search: search.

These dashboards index community alerts tweets, post-mortems, and independent write-ups. Reach them through the protocol name above to cross-check this reproduction against other analyses.

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