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CVE-2026-34061— nimiq/core-rs-albatross: Macro block proposal interlink bug

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 1.3.0之前版本存在数据伪造问题漏洞，该漏洞源于未检查选举宏块的interlink绑定，可能导致接受无效区块。

CVSS 4.9 · Medium EPSS 0.29% · P19
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I. Basic Information for CVE-2026-34061

Vulnerability Information
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Vulnerability Title
nimiq/core-rs-albatross: Macro block proposal interlink bug
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. Prior to version 1.3.0, an elected validator proposer can send an election macro block whose header.interlink does not match the canonical next interlink. Honest validators accept that proposal in verify_macro_block_proposal() because the proposal path validates header shape, successor relation, proposer, body root, and state, but never checks the interlink binding for election blocks. The same finalized block is later rejected by verify_block() during push with InvalidInterlink. Because validators prevote and precommit the malformed header hash itself, the failure happens after Tendermint decides the block, not before voting. This issue has been patched in version 1.3.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对数据真实性的验证不充分
Source: CVE Program / CVE List V5
Vulnerability Title
core-rs-albatross 数据伪造问题漏洞
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 1.3.0之前版本存在数据伪造问题漏洞，该漏洞源于未检查选举宏块的interlink绑定，可能导致接受无效区块。
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-2026-34061

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III. Intelligence Information for CVE-2026-34061

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Same Patch Batch · nimiq · 2026-04-03 · 3 CVEs total

CVE-2026-33184 7.5 HIGH nimiq/core-rs-albatross: Discovery handshake limit could underflow and later provoke a det
CVE-2026-35468 5.3 MEDIUM nimiq/core-rs-albatross: Panic in history index request handlers when a full node runs wit

IV. Related Vulnerabilities

Same product: core-rs-albatross
Same vendor: nimiq
Same weakness: CWE-345

V. Comments for CVE-2026-34061

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