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CVE-2026-46539

nimiq-primitives: BlockInclusionProof interlink issue when hops are empty

Published: Jun 9, 2026Updated: Jul 23, 2026 Sources: CVE List NVDCWE-345
5.9MEDIUM
NVD MITRE
EPSS Score
0.1%
Top 95.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:HPR:NUI:NS:UC:NI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-345

Affected Products

nimiq
oss-projectaka nimiq proof-of-stake, network-libp2p
core-rs-albatrossMixed
OSS Libraries / generic-library

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Collection
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References

https://github.com/nimiq/core-rs-albatross/pull/3705
github.com
https://github.com/nimiq/core-rs-albatross/releases/tag/v1.4.0
github.com
https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-799f-29jm-gr6c
github.com

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