CVE-2026-104434— Zebra before 8.0.0 Denial of Service via z_listunifiedreceivers RPC
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.
在 ZcashFoundation 的 Zebra 项目中，zebra-rpc 版本低于 8.0.0 以及 zebrad 版本低于 4.5.0 的版本存在一个可被触发的断言错误。该问题出现在 RPC 处理程序中，当对统一地址（Unified Addresses）中包含的无效 Jubjub 点进行 Sapling 接收者解析时，会调用 导致程序崩溃。经过身份验证的 RPC 客户端可以提交此类包含无效 Jubjub 点的数据，从而中止 进程的运行，并反复使节点保持离线状态。
Possible ATT&CK Techniques 1 AI
T1499 · Endpoint Denial of ServiceAffected Version Matrix 4
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| ZcashFoundation | zebra | < 8.0.0 |
affected |
8.0.0 |
unaffected | ||
< 4.5.0 |
affected | ||
4.5.0 |
unaffected |
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I. Basic Information for CVE-2026-104434
Vulnerability Information
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Vulnerability Title
Zebra before 8.0.0 Denial of Service via z_listunifiedreceivers RPC
Source: CVE Program / CVE List V5
Vulnerability Description
ZcashFoundation Zebra zebra-rpc before 8.0.0 and zebrad before 4.5.0 contain a reachable assertion in the z_listunifiedreceivers RPC handler, which calls expect() on Sapling receiver parsing that fails for Unified Addresses carrying invalid Jubjub points. Authenticated RPC clients can submit such an address to abort the zebrad process, repeatably keeping the node offline.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
可达断言
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| ZcashFoundation | zebra | 0 ~ 8.0.0 | - |
|
| ZcashFoundation | zebra | 0 ~ 4.5.0 | - |
|
II. Public POCs for CVE-2026-104434
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2026-104434 (2)
Same Patch Batch · ZcashFoundation · 2026-10-02 · 18 CVEs total
| CVE-2026-104422 | 7.5 HIGH | Zebra before 6.3.0 Block Sync Denial of Service via Coinbase scriptSig Rewrite |
| CVE-2026-104431 | 7.5 HIGH | Zebra before 6.0.0 Denial of Service via Synchronous Script FFI Verification |
| CVE-2026-104430 | 7.5 HIGH | Zebra 4.5.0 Consensus Split via P2SH Sigop Overcount |
| CVE-2026-104423 | 7.5 HIGH | Zebra before 6.2.1 Denial of Service via Uncapped V6 Shielded Proof Verification |
| CVE-2026-104437 | 7.4 HIGH | Zebra before 4.4.0 Consensus Split via SIGHASH_SINGLE Missing-Output Handling |
| CVE-2026-104435 | 7.4 HIGH | Zebra 4.4.0 Consensus Divergence via V5 SIGHASH_SINGLE Without Output |
| CVE-2026-104426 | 5.9 MEDIUM | Zebra before 6.1.0 Quadratic Complexity DoS via Block Transparent Value Check |
| CVE-2026-104427 | 5.9 MEDIUM | Zebra before 6.1.0 Chain Stall via Stale parent_error_map Entry |
| CVE-2026-104425 | 5.3 MEDIUM | Zebra before 6.1.0 Batch-Verification Poisoning DoS via Unattributed Pushed Transactions |
| CVE-2026-104432 | 5.3 MEDIUM | Zebra before 6.3.0 False Readiness via Discarded One-Hash FindBlocks Response |
| CVE-2026-104420 | 5.3 MEDIUM | Zebra before 6.3.0 Peer Misbehavior Ban Bypass via Gossiped Blocks |
| CVE-2026-104429 | 5.3 MEDIUM | Zebra before 6.0.0-rc.0 Per-Peer Mempool Admission Bypass via P2P tx Messages |
| CVE-2026-104421 | 5.3 MEDIUM | Zebra before 6.2.1 Block Download Denial of Service via KnownBlock SentHashes Lockout |
| CVE-2026-104428 | 5.3 MEDIUM | Zebra before 11.0.0 Denial of Service via getblock Verbosity 2 |
| CVE-2026-104419 | 4.8 MEDIUM | Zebra before 6.3.0 Honest Peer Banning via Far-Ahead FindBlocks Hashes |
| CVE-2026-104436 | 3.7 LOW | Zebra before 4.5.0 CPU Amplification via Uncapped getblocks/getheaders Locator Length |
| CVE-2026-104424 | 3.7 LOW | Zebra before 6.1.0 Incorrect Block Size Calculation in getblocktemplate |
IV. Related Vulnerabilities
Same product: zebra
-
CVE-2026-104437
Zebra before 4.4.0 Consensus Split via SIGHASH_SINGLE Missin -
CVE-2026-104436
Zebra before 4.5.0 CPU Amplification via Uncapped getblocks/ -
CVE-2026-104435
Zebra 4.4.0 Consensus Divergence via V5 SIGHASH_SINGLE Witho -
CVE-2026-104431
Zebra before 6.0.0 Denial of Service via Synchronous Script -
CVE-2026-104432
Zebra before 6.3.0 False Readiness via Discarded One-Hash Fi
Same vendor: ZcashFoundation
-
CVE-2026-104437
Zebra before 4.4.0 Consensus Split via SIGHASH_SINGLE Missin -
CVE-2026-104436
Zebra before 4.5.0 CPU Amplification via Uncapped getblocks/ -
CVE-2026-104435
Zebra 4.4.0 Consensus Divergence via V5 SIGHASH_SINGLE Witho -
CVE-2026-104432
Zebra before 6.3.0 False Readiness via Discarded One-Hash Fi -
CVE-2026-104431
Zebra before 6.0.0 Denial of Service via Synchronous Script
V. Comments for CVE-2026-104434
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