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CVE-2026-34069— nimiq-consensus panics via RequestMacroChain micro-block locator

Quick assessment

Affected
nimiq core-rs-albatross
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.

core-rs-albatross是Nimiq开源的一个Albatross协议的Rust实现。 core-rs-albatross 1.2.2及之前版本存在安全漏洞，该漏洞源于未经身份验证的p2p对等方可导致RequestMacroChain消息处理程序任务崩溃，可能导致拒绝服务。

CVSS 5.3 · Medium EPSS 0.52% · P42
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I. Basic Information for CVE-2026-34069

Vulnerability Information
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Vulnerability Title
nimiq-consensus panics via RequestMacroChain micro-block locator
Source: CVE Program / CVE List V5
Vulnerability Description
nimiq/core-rs-albatross is a Rust implementation of the Nimiq Proof-of-Stake protocol based on the Albatross consensus algorithm. In versions 1.2.2 and below, an unauthenticated p2p peer can cause the RequestMacroChain message handler task to panic. Sending a RequestMacroChain message where the first locator hash on the victim’s main chain is a micro block hash (not a macro block hash) causes said panic. The RequestMacroChain::handle handler selects the locator based only on "is on main chain", then calls get_macro_blocks() and panics via .unwrap() when the selected hash is not a macro block (BlockchainError::BlockIsNotMacro). This issue has been fixed in version 1.3.0.
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
可达断言
Source: CVE Program / CVE List V5
Vulnerability Title
core-rs-albatross 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
core-rs-albatross是Nimiq开源的一个Albatross协议的Rust实现。 core-rs-albatross 1.2.2及之前版本存在安全漏洞，该漏洞源于未经身份验证的p2p对等方可导致RequestMacroChain消息处理程序任务崩溃，可能导致拒绝服务。
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 core-rs-albatross < 1.3.0 -

II. Public POCs for CVE-2026-34069

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III. Intelligence Information for CVE-2026-34069

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Patches & Fixes for CVE-2026-34069 (1)

IV. Related Vulnerabilities

Same product: core-rs-albatross
Same vendor: nimiq
Same weakness: CWE-617

V. Comments for CVE-2026-34069

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