CVE-2026-42278
HighCVSS 8.8Exploitation Probability (EPSS)
Low risk39th percentile - higher than 39% of all known CVEs
Summary
UltraDAG is a minimal DAG-BFT blockchain in Rust. Prior to commit fb6ef59, the UltraDAG StateEngine implementation had a critical logic flaw in its policy enforcement pipeline, allowing unauthorized fund spending from 'Pocket'.
Risk Assessment
As a result of this vulnerability, any user (or attacker in possession of a parent key) could instantly drain every 'Pocket' on an account, posing a significant financial risk to the organization.
Recommendation
It is recommended to update to the version containing commit fb6ef59 to eliminate this critical security flaw.
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Original NVD description (English source)
UltraDAG is a minimal DAG-BFT blockchain in Rust. Prior to commit fb6ef59, the UltraDAG StateEngine implementation of SmartTransferTx contains a critical logic flaw in its policy enforcement pipeline. When a transaction originates from a "Pocket" (a derived sub-address documented in the protocol as a way to organize funds), the engine fails to resolve the pocket's parent account before checking the spending policy. Because pockets are "virtual" addresses that exist only as entries in the pocket_to_parent map and do not have their own SmartAccountConfig entries, the check_spending_policy method defaults to an "authorized/no policy" result. This allow any user (or attacker in possession of a parent key) to instantly drain every pocket on an account, even if the parent account has a strict 24-hour vault delay or a 1 UDAG daily limit. This issue has been patched via commit fb6ef59.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS