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NVD description
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.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
NONE
Momentum
STABLE
CVE-2026-42278 UltraDAG is a minimal DAG-BFT blockchain in Rust. Prior to commit fb6ef59, the UltraDAG StateEngine implementation of SmartTransferTx contains a critical logic flaw i… https://www.cve.org/CVERecord?id=CVE-2026-42278
Post summary
The post announces CVE-2026-42278, noting a critical logic flaw in the UltraDAG blockchain's SmartTransferTx implementation prior to commit fb6ef59.
CVE-2026-42278 Critical Logic Flaw in UltraDAG StateEngine SmartTransferTx Policy Enforcement https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-42278
Post summary
The post notes the discovery of CVE‑2026‑42278, describing it as a critical logic flaw in UltraDAG’s policy enforcement, but provides no further technical or remediation details.