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0xCERT Security Advisory 0xCERT-2026-0207
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Advisory-ID:  0xCERT-2026-0207
Severity:     Medium
Published:    2026-07-02T19:44:54.000Z
Updated:      2026-10-08T22:47:33.839Z
Chains:       n/a
URL:          https://www.0xcert.com/advisory/0xCERT-2026-0207

Title: Zebra: Finalized address balance credit-first overflow on consensus-valid blocks

Summary
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Zebra: Finalized address balance credit-first overflow on consensus-valid blocks. You are affected if: 1. You run zebrad up to and including v4.4.1. 2. Your node processes blocks on any Zcash network. The finalized transparent address balance writer processes all newly-created outputs (credits) before processing spent outputs (debits) within the same block.

Details
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Summary
You are affected if: 1. You run zebrad up to and including v4.4.1. 2. Your node processes blocks on any Zcash network. The finalized transparent address balance writer processes all newly-created outputs (credits) before processing spent outputs (debits) within the same block.

Affected
- - zebra-state (rust) <= 6.0.0 — fixed in 7.0.0
- - zebrad (rust) <= 4.4.1 — fixed in 4.5.0

Severity
Medium (CVSS 6.9), 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-w834-cf6p-9m9w / CVE-2026-52738 from the GitHub Advisory Database, credited upstream to sangsoo-osec, mpguerra, oxarbitrage: https://github.com/advisories/GHSA-w834-cf6p-9m9w. Details may change; refer to the original source for the authoritative record.

References
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- - https://github.com/advisories/GHSA-w834-cf6p-9m9w
- - CVE-2026-52738
- - https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-w834-cf6p-9m9w

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