CVE-2026-42278

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.8 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 71% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
8.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
8.8
EG Score
8.8(medium)
EPSS
29.7%
KEV
Not listed

Published

May 8, 2026

Last Modified

May 19, 2026

Advisory Details (2)

Auto-updated May 8, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

Smart Account Spending Policy Bypass via Pockets · Advisory · UltraDAGcom/core · GitHub

https://github.com/UltraDAGcom/core/security/advisories/GHSA-9chc-gjfr-6hrq
generic

fix(smart-account): enforce parent policy on pocket transfers (GHSA-9… · UltraDAGcom/core@fb6ef59 · GitHub

https://github.com/UltraDAGcom/core/commit/fb6ef59d6c1385400e7acea7ae31fc6a473c3051

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 9× in last 7d / 39× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 110 total refreshes for this CVE.

  1. 2026-07-16 17:03 UTCEPSS rescore
  2. 2026-07-16 06:19 UTCOSV refresh
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Frequently asked(5)

What is CVE-2026-42278?
CVE-2026-42278 is a high vulnerability published on May 8, 2026. 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…
When was CVE-2026-42278 disclosed?
CVE-2026-42278 was first published in the National Vulnerability Database on May 8, 2026, with the most recent update on May 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-42278 actively exploited?
CVE-2026-42278 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 29.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-42278?
CVE-2026-42278 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-42278?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-42278, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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