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CVE-2026-46539— nimiq-primitives: BlockInclusionProof interlink issue when hops are empty

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.

Nimiq是Nimiq开源的一个Albatross协议的Rust实现。 Nimiq 1.4.0之前版本存在数据伪造问题漏洞，该漏洞源于BlockInclusionProof::is_block_proven函数中逻辑缺陷，导致在get_interlink_hops返回空跳列表时未执行任何加密验证即返回true。

CVSS 5.9 · Medium EPSS 0.21% · P10

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
nimiq core-rs-albatross < 1.4.0 affected
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I. Basic Information for CVE-2026-46539

Vulnerability Information
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Vulnerability Title
nimiq-primitives: BlockInclusionProof interlink issue when hops are empty
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
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
Nimiq 数据伪造问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Nimiq是Nimiq开源的一个Albatross协议的Rust实现。 Nimiq 1.4.0之前版本存在数据伪造问题漏洞，该漏洞源于BlockInclusionProof::is_block_proven函数中逻辑缺陷，导致在get_interlink_hops返回空跳列表时未执行任何加密验证即返回true。
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 < 1.4.0 -

II. Public POCs for CVE-2026-46539

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III. Intelligence Information for CVE-2026-46539

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Patches & Fixes for CVE-2026-46539 (1)

Vendor Advisories for CVE-2026-46539 (1)

Vendor Pages for CVE-2026-46539 (1)

Same Patch Batch · nimiq · 2026-06-09 · 7 CVEs total

CVE-2026-46545 7.5 HIGH nimiq-primitives: Panic DoS in trie chunk processing via ROOT-keyed item
CVE-2026-46541 7.5 HIGH Nimiq network-libp2p: DHT query poisoning via first-record verification failure
CVE-2026-46540 6.5 MEDIUM Nimiq light-blockchain: Light blockchain rebranch issue
CVE-2026-46543 5.3 MEDIUM nimiq-blockchain: Genesis batch set request
CVE-2026-44505 5.3 MEDIUM Nimiq network-libp2p: Untrusted peer can wedge DHT
CVE-2026-46542 4.3 MEDIUM nimiq-keys: Denial of service in Ed25519 multisig delinearization via invalid curve points

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-46539

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