CVE-2026-104426
8.2
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| ZcashFoundation | zebra | 0 < 6.1.0 | affected |
| ZcashFoundation | zebra | 6.1.0 | unaffected |
Weaknesses
- CWE-407: Inefficient Algorithmic Complexity
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: partial
References
- https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-4g24-549m-hp75
- https://www.vulncheck.com/advisories/zebra-before-6.1.0-quadratic-complexity-dos-via-block-transparent-value-check
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