CVE-2026-34061

4.9 MEDIUM
Published: April 03, 2026 Modified: April 13, 2026
View on NVD

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://github.com/nimiq/core-rs-albatross/pull/3668
Source: security-advisories@github.com
Patch
https://github.com/nimiq/core-rs-albatross/releases/tag/v1.3.0
Source: security-advisories@github.com
Release Notes
https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-gr83-j5f8-p2r5
Source: security-advisories@github.com
Third Party Advisory

4 reference(s) from NVD

Quick Stats

CVSS v3 Score
4.9 / 10.0
EPSS (Exploit Probability)
0.0%
6th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

nimiq