CVE-2026-34061
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: security-advisories@github.com — https://github.com/nimiq/core-rs-albatross/releases/tag/v1.3.0
Vendor advisory: security-advisories@github.com — https://github.com/nimiq/core-rs-albatross/pull/3668
Vendor advisory: security-advisories@github.com — https://github.com/nimiq/core-rs-albatross/commit/9d7d17c9163384e79f61cdbbfe9853ae57bb8bf7
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| nimiq | nimiq_proof-of-stake | {"endIncluding":"1.2.2"} | |
References
CWEs
CWE-345
Verify integrity in audit chain (admin only). AS-IS.