CVE-2026-34202: Zebra node crash — V5 transaction hash panic (P2P reachable)
A vulnerability in Zebra’s transaction processing logic allows a remote, unauthenticated attacker to cause a Zebra node to panic (crash). This is triggered by sending a specially crafted V5 transaction that passes initial deserialization but fails during transaction ID calculation.
References
- github.com/ZcashFoundation/zebra
- github.com/ZcashFoundation/zebra/releases/tag/v4.3.0
- github.com/ZcashFoundation/zebra/security/advisories/GHSA-qp6f-w4r3-h8wg
- github.com/advisories/GHSA-qp6f-w4r3-h8wg
- nvd.nist.gov/vuln/detail/CVE-2026-34202
- zfnd.org/zebra-4-3-0-critical-security-fixes-zip-235-support-and-performance-improvements
Code Behaviors & Features
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