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CVE-2026-52738— ZEBRA: Finalized address balance credit-first overflow on consensus-valid blocks

Quick assessment

Affected
ZcashFoundation zebra
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Zcash Foundation ZEBRA是Zcash Foundation基金会的一款区块链网络节点实现。 Zcash Foundation ZEBRA 4.5.0之前版本存在异常处理不当漏洞，该漏洞源于zebra-state/src/service/finalized_state/zebra_db/transparent.rs中最终状态写入器在处理区块时先应用新创建的输出信用再应用支出借方，导致中间余额超过MAX_MONEY，引发基于expect的panic，可能导致Zebra节点永久停止。

CVSS 6.9 · Medium EPSS 0.37% · P30

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 2

VendorProduct Version RangeStatus
ZcashFoundation zebra < 4.5.0 affected
ZcashFoundation zebra-state < 7.0.0 affected
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I. Basic Information for CVE-2026-52738

Vulnerability Information
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Vulnerability Title
ZEBRA: Finalized address balance credit-first overflow on consensus-valid blocks
Source: CVE Program / CVE List V5
Vulnerability Description
ZEBRA is a Zcash node written entirely in Rust. Prior to 4.5.0, a consensus-valid block containing a long chain of transparent self-spends to one address can permanently halt Zebra nodes. In zebra-state/src/service/finalized_state/zebra_db/transparent.rs, the finalized-state writer originally applied every newly created output as a credit before applying any spent-output debit from the same block. That credit-first ordering can make the intermediate per-address balance exceed MAX_MONEY even though the final net balance is valid, causing an expect-based panic under the panic equals abort release profile. Because zcashd accepts the triggering block and Zebra encounters it again after every restart, the halt persists until patched software is deployed; exploitation requires mining the specially constructed block and temporarily committing sufficient ZEC to the self-spend chain. This issue is fixed in version 4.5.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
未捕获的异常
Source: CVE Program / CVE List V5
Vulnerability Title
Zcash Foundation ZEBRA 异常处理不当漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Zcash Foundation ZEBRA是Zcash Foundation基金会的一款区块链网络节点实现。 Zcash Foundation ZEBRA 4.5.0之前版本存在异常处理不当漏洞，该漏洞源于zebra-state/src/service/finalized_state/zebra_db/transparent.rs中最终状态写入器在处理区块时先应用新创建的输出信用再应用支出借方，导致中间余额超过MAX_MONEY，引发基于expect的panic，可能导致Zebra节点永久停止。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
ZcashFoundation zebra < 4.5.0 -
ZcashFoundation zebra-state < 7.0.0 -

II. Public POCs for CVE-2026-52738

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III. Intelligence Information for CVE-2026-52738

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Vendor Advisories for CVE-2026-52738 (1)

Vendor Pages for CVE-2026-52738 (1)

Same Patch Batch · ZcashFoundation · 2026-08-18 · 10 CVEs total

CVE-2026-52735 9.3 CRITICAL ZEBRA: Consensus divergence via P2SH sigop undercount in pure-Rust disabled-opcode parser
CVE-2026-52736 8.7 HIGH ZEBRA: Block suppression via NU5 same-header body poisoning of sent-hash cache
CVE-2026-52829 7.5 HIGH ZEBRA: IPv4-Mapped Mempool Misbehavior Update Aborts Zebra Address Book
CVE-2026-52731 6.5 MEDIUM ZEBRA: Full node denial of service via non-ASCII LongPollId in getblocktemplate
CVE-2026-52733 6.5 MEDIUM ZEBRA: Persistent on-disk corruption of Sapling/Orchard subtree roots after chain fork via
CVE-2026-52739 5.9 MEDIUM ZEBRA: Repeated Non-Finalized Shielded Transaction Aborts Zebra Before Duplicate-Nullifier
CVE-2026-52737 5.3 MEDIUM ZEBRA: Sync restart poisoning from single unauthenticated peer via above-lookahead block
CVE-2026-52732 5.3 MEDIUM ZEBRA: Mempool transaction admission denial via single-peer inbound queue saturation
CVE-2026-52734 5.3 MEDIUM ZEBRA: Unbounded memory leak in mempool download pipeline via timeout path cancel_handles

IV. Related Vulnerabilities

Same product: zebra
Same vendor: ZcashFoundation
Same weakness: CWE-248

V. Comments for CVE-2026-52738

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