nimiq-primitives: BlockInclusionProof interlink issue when hops are empty_CVE-2026-46539

5.9 / 10

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Description

Nimiq is a Rust implementation of the Nimiq Proof-of-Stake protocol based on the Albatross consensus algorithm. Prior to version 1.4.0, a logic flaw in BlockInclusionProof::is_block_proven causes the function to return true without performing any cryptographic verification when get_interlink_hops yields an empty hop list. This occurs when the target block is at the election block position immediately preceding the election head's epoch. An attacker providing transaction inclusion proofs can forge a MacroBlock header for that epoch position and have it accepted as "proven" without any hash or signature verification. This issue has been patched in version 1.4.0.

Basic Information

ID CVE-2026-46539

Source GitHub_M

Published Jun 9, 2026 at 23:44

Affected Product

Vendor nimiq

Product core-rs-albatross

Version < 1.4.0

Affected Versions nimiq core-rs-albatross < 1.4.0

CWE Classification

CWE-345

References

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    "published": "2026-06-09T23:44:34.283Z",
    "modified": "2026-06-09T23:44:34.283Z",
    "type": "cve",
    "title": "nimiq-primitives: BlockInclusionProof interlink issue when hops are empty",
    "source": "GitHub_M",
    "references": "https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-799f-29jm-gr6c\nhttps://github.com/nimiq/core-rs-albatross/pull/3705\nhttps://github.com/nimiq/core-rs-albatross/releases/tag/v1.4.0",
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