Zebra node crash — V5 transaction hash panic (P2P reachable)
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.
Vuln-watch · relayed from the GitHub Advisory Database; see Source & attribution below
Summary
--- 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.
Affected
- zebrad (rust) < 4.3.0 — fixed in 4.3.0
- zebra-chain (rust) < 6.0.1 — fixed in 6.0.1
Severity
Critical (CVSS 9.2), as rated by the upstream advisory.
Recommended actions
- Upgrade zebrad to 4.3.0 or later
- Upgrade zebra-chain to 6.0.1 or later
Source & attribution
This 0xCERT advisory summarises GHSA-qp6f-w4r3-h8wg / CVE-2026-34202 from the GitHub Advisory Database, credited upstream to robustfengbin, arya2, conradoplg, upbqdn, mpguerra: https://github.com/advisories/GHSA-qp6f-w4r3-h8wg. Details may change; refer to the original source for the authoritative record.
References
- https://github.com/advisories/GHSA-qp6f-w4r3-h8wg
- CVE-2026-34202
- https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-qp6f-w4r3-h8wg
- https://github.com/ZcashFoundation/zebra/releases/tag/v4.3.0
- https://zfnd.org/zebra-4-3-0-critical-security-fixes-zip-235-support-and-performance-improvements
- https://nvd.nist.gov/vuln/detail/CVE-2026-34202
OpenPGP-signed. The signed text of this advisory verifies against the 0xCERT key CCC7 D9EC 9415 723D.
Published 2026-03-27 · last updated 2026-10-08
curl -s https://www.0xcert.com/pgp.asc | gpg --import && curl -s https://www.0xcert.com/advisory/0xCERT-2026-0223/signed.txt | gpg --verify