# Possible mistake in the unregister by index functions Low/Info · Sherlock · Yield-tokenisation vaults · 16th December 2025 Finding L-2 of the Spectra MetaVault Bridge security review. - Protocol: https://www.spectra.finance/ - Report: /reports/spectra-metavault-bridge - Source: https://github.com/0xsimao/audits/blob/main/Sherlock/private-audits/2025-12-16-spectra-metavault.pdf --- ## Summary `MetavaultsRegistry::unregisterMarketByIndex()` don't check that the index matches the expected market, which may lead to issues if called twice in a row. ## Vulnerability Detail As `MetavaultsRegistry::unregisterMarketByIndex()` doesn't check the market, if 2 calls are made consecutively, they may arrive at the blockchain in different order, and remove the wrong markets (array popping changes order). ## Impact ## Code Snippet https://github.com/sherlock-audit/2025-12-spectra-metavault-update-dec-16th/pull/2/files#diff-d6dbd850708b46c46f64d8bc2d13e4fe2de6f7ac75f0981bf638274c7830a293R187 ## Tool Used Manual Review ## Recommendation Send the expected market as argument to verify. Disclosed by 0xSimao (https://0xsimao.com/).