CVE-2026-104426
Zebra before 6.1.0 contains an inefficient algorithmic complexity vulnerability in remaining_transaction_value that clones the entire block-
CVSS
5.9
Medium
EPSS
0.3%
p21
KEV
—
Exploit Today
6
0-100
Published: Oct 2, 2026 · Last modified: Oct 2, 2026 · CWE-407
0.3%EPSS · 30 days0.3%
2026-10-032026-10-04
Zebra before 6.1.0 contains an inefficient algorithmic complexity vulnerability in remaining_transaction_value that clones the entire block-level spent-UTXO map per transaction during contextual verification. Attackers can mine or seed the mempool with roughly 26,000 minimal single-input transactions in one block, stalling every validating node for over 52 seconds.
CVECVSSEPSSKEVRExploitTitleMod.
CVE-2026-1048445.9 MED31.2%
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