CVE-2026-46539 json
nimiq-primitives: BlockInclusionProof interlink issue when hops are empty
published 2026-05-21 5 mo ago modified 2026-07-23 3 mo ago also EUVD-2026-35880 , GHSA-799f-29jm-gr6c
- cvss
- 5.9
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.1%
- EPSS 0.1% chance of exploitation in 30 days, percentile 4%
- public exploits
- 0
- none known
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.
Patch / fix
- nimiq core-rs-albatross 1.4.0
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 4 mo ago
Exploit prediction
0.15% chance of exploitation in the next 30 days, higher than 4% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N |
| GitHub | 3.1 | 5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| crates.io | nimiq-primitives | <=0.2.0 |
no fix listed |
Affected products
- nimiq core-rs-albatross
Classification
- Weakness
-
- CWE-345 Insufficient Verification of Data Authenticity
References
-
github.com
/nimiq/core-rs-albatross/pull/3705
web
-
github.com
/nimiq/core-rs-albatross/commit/cc5a1d54bbbffd1ea975bd2ee87d5f7b3b30bbf1
web
-
github.com
/nimiq/core-rs-albatross/security/advisories/GHSA-799f-29jm-gr6c
web
-
github.com
/nimiq/core-rs-albatross/releases/tag/v1.4.0
web
-
nvd.nist.gov
/vuln/detail/CVE-2026-46539
advisory
-
github.com
/nimiq/core-rs-albatross
package
Sources
- CVE List CVE-2026-46539
- GitHub Advisory GHSA-799f-29jm-gr6c
- NVD CVE-2026-46539
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.