CVE-2026-34066— nimiq-blockchain: Peer-triggerable panic during history sync
Quick assessment
Affected
nimiq nimiq-blockchain
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.
Nimiq是Nimiq开源的一个Albatross协议的Rust实现。 Nimiq 1.3.0之前版本存在输入验证错误漏洞，该漏洞源于nimiq-blockchain中HistoryStore::put_historic_txns使用assert!来强制执行关于HistoricTransaction.block_number的不变量。在历史同步期间，对等方可以影响传递给Blockchain::push_history_sync的history输入，格式错误的历史列表可能违反这些不变量并触发panic。ex
Possible ATT&CK Techniques 1 AI
T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2026-34066
Vulnerability Information
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Vulnerability Title
nimiq-blockchain: Peer-triggerable panic during history sync
Source: CVE Program / CVE List V5
Vulnerability Description
nimiq-blockchain provides persistent block storage for Nimiq's Rust implementation. Prior to version 1.3.0, `HistoryStore::put_historic_txns` uses an `assert!` to enforce invariants about `HistoricTransaction.block_number` (must be within the macro block being pushed and within the same epoch). During history sync, a peer can influence the `history: &[HistoricTransaction]` input passed into `Blockchain::push_history_sync`, and a malformed history list can violate these invariants and trigger a panic. `extend_history_sync` calls `this.history_store.add_to_history(..)` before comparing the computed history root against the macro block header (`block.history_root()`), so the panic can happen before later rejection checks run. The patch for this vulnerability is included as part of v1.3.0. No known workarounds are available.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Nimiq 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Nimiq是Nimiq开源的一个Albatross协议的Rust实现。 Nimiq 1.3.0之前版本存在输入验证错误漏洞，该漏洞源于nimiq-blockchain中HistoryStore::put_historic_txns使用assert!来强制执行关于HistoricTransaction.block_number的不变量。在历史同步期间，对等方可以影响传递给Blockchain::push_history_sync的history输入，格式错误的历史列表可能违反这些不变量并触发panic。ex
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 |
|---|---|---|---|---|
| nimiq | nimiq-blockchain | < 1.3.0 | - |
|
II. Public POCs for CVE-2026-34066
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-34066 (1)
Vendor Advisories for CVE-2026-34066 (1)
Same Patch Batch · nimiq · 2026-04-22 · 8 CVEs total
| CVE-2026-33471 | 9.6 CRITICAL | nimiq-block has skip block quorum bypass via out-of-range BitSet indices & u16 truncation |
| CVE-2026-34063 | 7.5 HIGH | network-libp2p: Peer can crash the node by opening discovery protocol substream twice |
| CVE-2026-34065 | 7.5 HIGH | nimiq-primitives: Node crash due to missing interlink validation in election macro block p |
| CVE-2026-34068 | 6.8 MEDIUM | nimiq-transaction: UpdateValidator transactions allows voting key change without proof-of- |
| CVE-2026-34062 | 5.3 MEDIUM | Nimiq has Allocation of Resources Without Limits or Throttling in its libp2p request/respo |
| CVE-2026-34064 | 5.3 MEDIUM | nimiq-account: Vesting insufficient funds error can panic |
| CVE-2026-34067 | 3.1 LOW | nimiq-transaction vulnerable to panic via `HistoryTreeProof` length mismatch |
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V. Comments for CVE-2026-34066
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