Zebra: Repeated Non-Finalized Shielded Transaction Aborts Zebra Before Duplicate-Nullifier Rejection
Zebra: Repeated Non-Finalized Shielded Transaction Aborts Zebra Before Duplicate-Nullifier Rejection. You are affected if: 1. You run zebrad up to and including v4.4.1. 2. Your node processes blocks past the checkpoint height (non-finalized state is active). 3. The network has NU5 or later activated.
Vuln-watch · relayed from the GitHub Advisory Database; see Source & attribution below
Summary
You are affected if: 1. You run zebrad up to and including v4.4.1. 2. Your node processes blocks past the checkpoint height (non-finalized state is active). 3. The network has NU5 or later activated.
Affected
- zebra-state (rust) <= 6.0.0 — fixed in 7.0.0
- zebrad (rust) <= 4.4.1 — fixed in 4.5.0
Severity
Medium, as rated by the upstream advisory.
Recommended actions
- Upgrade zebra-state to 7.0.0 or later
- Upgrade zebrad to 4.5.0 or later
Source & attribution
This 0xCERT advisory summarises GHSA-hhm7-qrv5-h4r6 / CVE-2026-52739 from the GitHub Advisory Database, credited upstream to Haxatron, mpguerra, conradoplg: https://github.com/advisories/GHSA-hhm7-qrv5-h4r6. Details may change; refer to the original source for the authoritative record.
References
- https://github.com/advisories/GHSA-hhm7-qrv5-h4r6
- CVE-2026-52739
- https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-hhm7-qrv5-h4r6
- https://github.com/ZcashFoundation/zebra/blob/d4cd662c716382f6397d2a730148025a1ca79fec/Cargo.toml#L304-L305
- https://github.com/ZcashFoundation/zebra/blob/d4cd662c716382f6397d2a730148025a1ca79fec/zebra-consensus/src/transaction.rs#L521-L526
- https://github.com/ZcashFoundation/zebra/blob/d4cd662c716382f6397d2a730148025a1ca79fec/zebra-state/src/service/non_finalized_state/chain.rs#L1608-L1628
OpenPGP-signed. The signed text of this advisory verifies against the 0xCERT key CCC7 D9EC 9415 723D.
Published 2026-07-02 · last updated 2026-10-08
curl -s https://www.0xcert.com/pgp.asc | gpg --import && curl -s https://www.0xcert.com/advisory/0xCERT-2026-0208/signed.txt | gpg --verify