What’s Vulnerable › Vulnerabilities

CVE-2026-40583: UltraDAG: SmartOp Vote Path Triggers Fatal Supply Invariant Halt

• Severity: high (CVSS 8.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-04-21 · updated 2026-10-26
• Weakness: CWE-460

Description

UltraDAG is a minimal DAG-BFT blockchain in Rust. In version 0.1, a non-council attacker can submit a signed SmartOp::Vote transaction that passes signature, nonce, and balance prechecks, but fails authorization only after state mutation has already occurred.

Affected products

• Ultradag: 0.1.0

References

• https://github.com/UltraDAGcom/core/commit/2f5a3a237ea519b48d71e6e3093c89f60694c7be
• https://github.com/UltraDAGcom/core/commit/45bcf7064741897319b6196d3d9f9e1307093511
• https://github.com/UltraDAGcom/core/security/advisories/GHSA-q8wx-2crx-c7pp
• https://github.com/UltraDAGcom/core/security/advisories/GHSA-q8wx-2crx-c7pp

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