CVE-2026-34061

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.

CVSS v3 4.9 MEDIUM

4.9^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.2 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/nimiq/core-rs-albatross/commit/9d7d17c9163384e79f61cdbbfe9853ae57bb8bf7	Patch
https://github.com/nimiq/core-rs-albatross/pull/3668	Patch
https://github.com/nimiq/core-rs-albatross/releases/tag/v1.3.0	Release Notes
https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-gr83-j5f8-p2r5	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:nimiq:nimiq_proof-of-stake:*:*:*:*:*:rust:*:*

History

No history.

Information

Published : 2026-04-03 23:17

Updated : 2026-07-24 22:10

NVD link : CVE-2026-34061

Mitre link : CVE-2026-34061

CVE.ORG link : CVE-2026-34061

JSON object : View

Products Affected

nimiq

nimiq_proof-of-stake

CWE

CWE-345

Insufficient Verification of Data Authenticity

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