CVE-2026-104429— Zebra before 6.0.0-rc.0 Per-Peer Mempool Admission Bypass via P2P tx Messages
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 Zebra（zebrad）5.0.0 至 6.0.0-rc.0（不含 6.0.0-rc.0）版本中，程序未对其接收到的直接 P2P 交易消息所对应的交易应用每 Peer 的交易池（mempool）准入限制。这是因为这些交易在排队时未记录其来源 Peer。远程入站 Peer 可以推送大量唯一的交易，从而占据不成比例的交易池准入名额，挤占诚实 Peer 的交易转发空间。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 2
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| ZcashFoundation | zebra | < 6.0.0-rc.0 |
affected |
6.0.0-rc.0 |
unaffected |
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I. Basic Information for CVE-2026-104429
Vulnerability Information
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Vulnerability Title
Zebra before 6.0.0-rc.0 Per-Peer Mempool Admission Bypass via P2P tx Messages
Source: CVE Program / CVE List V5
Vulnerability Description
Zebra (zebrad) 5.0.0 before 6.0.0-rc.0 does not apply its per-peer mempool admission cap to transactions received as direct P2P tx messages, because these are queued without the sending peer recorded as their source. A remote inbound peer can push many unique transactions to occupy a disproportionate share of mempool admission slots, crowding out honest peers' transaction relay.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| ZcashFoundation | zebra | 0 ~ 6.0.0-rc.0 | - |
|
II. Public POCs for CVE-2026-104429
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2026-104429 (2)
Same Patch Batch · ZcashFoundation · 2026-10-02 · 18 CVEs total
| CVE-2026-104423 | 7.5 HIGH | Zebra before 6.2.1 Denial of Service via Uncapped V6 Shielded Proof Verification |
| CVE-2026-104430 | 7.5 HIGH | Zebra 4.5.0 Consensus Split via P2SH Sigop Overcount |
| CVE-2026-104431 | 7.5 HIGH | Zebra before 6.0.0 Denial of Service via Synchronous Script FFI Verification |
| CVE-2026-104422 | 7.5 HIGH | Zebra before 6.3.0 Block Sync Denial of Service via Coinbase scriptSig Rewrite |
| CVE-2026-104435 | 7.4 HIGH | Zebra 4.4.0 Consensus Divergence via V5 SIGHASH_SINGLE Without Output |
| CVE-2026-104437 | 7.4 HIGH | Zebra before 4.4.0 Consensus Split via SIGHASH_SINGLE Missing-Output Handling |
| CVE-2026-104434 | 6.5 MEDIUM | Zebra before 8.0.0 Denial of Service via z_listunifiedreceivers RPC |
| 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-2026-104428 | 5.3 MEDIUM | Zebra before 11.0.0 Denial of Service via getblock Verbosity 2 |
| CVE-2026-104432 | 5.3 MEDIUM | Zebra before 6.3.0 False Readiness via Discarded One-Hash FindBlocks Response |
| CVE-2026-104425 | 5.3 MEDIUM | Zebra before 6.1.0 Batch-Verification Poisoning DoS via Unattributed Pushed Transactions |
| CVE-2026-104420 | 5.3 MEDIUM | Zebra before 6.3.0 Peer Misbehavior Ban Bypass via Gossiped Blocks |
| CVE-2026-104421 | 5.3 MEDIUM | Zebra before 6.2.1 Block Download Denial of Service via KnownBlock SentHashes Lockout |
| CVE-2026-104419 | 4.8 MEDIUM | Zebra before 6.3.0 Honest Peer Banning via Far-Ahead FindBlocks Hashes |
| CVE-2026-104424 | 3.7 LOW | Zebra before 6.1.0 Incorrect Block Size Calculation in getblocktemplate |
| CVE-2026-104436 | 3.7 LOW | Zebra before 4.5.0 CPU Amplification via Uncapped getblocks/getheaders Locator Length |
IV. Related Vulnerabilities
Same product: zebra
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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-2026-104434
Zebra before 8.0.0 Denial of Service via z_listunifiedreceiv -
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
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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-2026-104434
Zebra before 8.0.0 Denial of Service via z_listunifiedreceiv -
CVE-2026-104435
Zebra 4.4.0 Consensus Divergence via V5 SIGHASH_SINGLE Witho -
CVE-2026-104431
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Same weakness: CWE-770
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