TI-2026-34218 Aliases CVE-2026-46539 GHSA-799f-29jm-gr6c

nimiq-primitives: BlockInclusionProof interlink issue when hops are empty

LOW 25CWE-345Published 2026-06-09 · Updated 2026-06-10

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: High
Impact type: Security bypass
Confidentiality · integrity · availability: None · High · None
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-345.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.0015 4th percentileScored 2026-11-07

Fix Fixed core-rs-albatross (nimiq): 1.4.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
nimiq	core-rs-albatross	before 1.4.0	1.4.0	Patch available	CNA
—	nimiq-primitives (crates.io)	up to 0.2.0	—	No fix listed	GHSA-799f-29jm-gr6c

core-rs-albatross Vendornimiq Affected before 1.4.0 Fixed in 1.4.0 Patch available CNA
nimiq-primitives (crates.io) Vendor— Affected up to 0.2.0 Fixed in — No fix listed GHSA-799f-29jm-gr6c

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:nimiq:nimiq_proof-of-stake::::::::	—	—	nimiq

cpe:2.3:a:nimiq:nimiq_proof-of-stake:*:*:*:*:*:*:*:* Versions — — ·nimiq

Remediation

Fix · CNA core-rs-albatross (nimiq) Fixed in 1.4.0

Timeline

2026-10-02 Threatist record created from CVE-2026-46539
2026-10-03 Alias added: GHSA-799f-29jm-gr6c

References

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2026-46539

Other 5

TI-2026-26389 nimiq-account: Vesting insufficient funds error can panic CVSS 3.1HIGH 8.2
TI-2026-25867 nimiq-block has skip block quorum bypass via out-of-range BitSet indices & u16 truncation CVSS 3.1CRITICAL 9.6
TI-2026-34086 Nimiq: Validity store off by one error CVSS 3.1HIGH 7.5
TI-2026-28920 nimiq-keys: Unchecked Ed25519 signature length in TaggedPublicKey::verify causes remote node panic via DHT CVSS 3.1HIGH 7.5
TI-2025-29800 nimiq-network-libp2p Uncontrolled Resource Consumption vulnerability CVSS 3.1HIGH 7.5
TI-2026-34224 nimiq-primitives: Panic DoS in trie chunk processing via ROOT-keyed item CVSS 3.1HIGH 7.5

See all 27 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences