CVE-2026-123559High· 7.5▾ TwilightZebra before 7.0.0 contains an inefficient algorithmic complexity vulnerability that allows unauthenticated peers to exhaust verification threads by submitting transactions with many transparent inputs. Attackers can relay invalid transa…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 41.3 · likelihood 0 · exploitation 0
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Zebra before 7.0.0 contains an inefficient algorithmic complexity vulnerability that allows unauthenticated peers to exhaust verification threads by submitting transactions with many transparent inputs. Attackers can relay invalid transactions with tens of thousands of inputs, forcing quadratic ZIP-244 or ZIP-243 digest recomputation that stalls Rayon-backed block verification for minutes.
zebra < 7.0.0Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-123554High· 7.5Zebra zebrad 6.4.0 before 7.0.0 Denial of Service via Mempool Coinbase-Maturity Check
CVE-2026-104426Medium· 5.9Zebra 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
CVE-2026-123555High· 7.5Zebra 2.3.0 before 7.0.0 Denial of Service via Unscored Script Verification Failures
CVE-2026-123558High· 7.5Zebra before 7.0.0 Checkpoint Sync Denial of Service via Cancelled Verifier Rewind
CVE-2026-123556Medium· 5.3Zebra 4.5.0 before 7.0.0 Honest Peer Ban via Mempool Lock-Time Scoring
CVE-2026-123557Medium· 5.9Zebra zebrad before 7.0.0 Reachable Assertion DoS via Peer Disconnection