PT-2026-30254 · Nimiq · Core-Rs-Albatross

Published 2026-04-03 · Updated 2026-04-03 · CVE-2026-34061

Mitre

CVSS v3.1

4.9

Medium

AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

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.

Fix

Insufficient Verification of Data Authenticity

Weakness Enumeration

CWE-345

Related Identifiers

CVE-2026-34061

Affected Products

Core-Rs-Albatross

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-34061 · Security Note
• https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-gr83-j5f8-p2r5 · Note
• https://github.com/nimiq/core-rs-albatross/commit/9d7d17c9163384e79f61cdbbfe9853ae57bb8bf7 · Note
• https://github.com/nimiq/core-rs-albatross/pull/3668 · Note
• https://github.com/nimiq/core-rs-albatross/releases/tag/v1.3.0 · Note