Vulnerability Description
nimiq/core-rs-albatross is a Rust implementation of the Nimiq Proof-of-Stake protocol based on the Albatross consensus algorithm. Prior to version 1.3.0, an elected validator proposer can send an election macro block whose header.interlink does not match the canonical next interlink. Honest validators accept that proposal in verify_macro_block_proposal() because the proposal path validates header shape, successor relation, proposer, body root, and state, but never checks the interlink binding for election blocks. The same finalized block is later rejected by verify_block() during push with InvalidInterlink. Because validators prevote and precommit the malformed header hash itself, the failure happens after Tendermint decides the block, not before voting. This issue has been patched in version 1.3.0.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Nimiq | Nimiq Proof-Of-Stake | <= 1.2.2 |
Related Weaknesses (CWE)
References
- https://github.com/nimiq/core-rs-albatross/commit/9d7d17c9163384e79f61cdbbfe9853Patch
- https://github.com/nimiq/core-rs-albatross/pull/3668Patch
- https://github.com/nimiq/core-rs-albatross/releases/tag/v1.3.0Release Notes
- https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-gr83-j5f8-p2Third Party Advisory
FAQ
What is CVE-2026-34061?
CVE-2026-34061 is a vulnerability with a CVSS score of 4.9 (MEDIUM). nimiq/core-rs-albatross is a Rust implementation of the Nimiq Proof-of-Stake protocol based on the Albatross consensus algorithm. Prior to version 1.3.0, an elected validator proposer can send an elec...
How severe is CVE-2026-34061?
CVE-2026-34061 has been rated MEDIUM with a CVSS base score of 4.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-34061?
Check the references section above for vendor advisories and patch information. Affected products include: Nimiq Nimiq Proof-Of-Stake.