---
id: CVE-2026-46369
title: >-
  Nimiq is a Rust implementation of the Nimiq Proof-of-Stake protocol based on
  the Albatross consensus algorithm
summary: >-
  Nimiq is a Rust implementation of the Nimiq Proof-of-Stake protocol based on
  the Albatross consensus algorithm. Through 1.5.0, the validity store uses a
  strict lower-bound comparison that expires a stored transaction too early
  relative t…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N'
cwe:
  - CWE-193
  - CWE-294
vendor: nimiq-blockchain
product: nimiq-blockchain
affected:
  - nimiq-blockchain <= 1.5.0
patched:
  - nimiq-blockchain 1.5.1
published: '2026-08-26'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T21:09:13.080'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-46369'
references:
  - url: >-
      https://github.com/nimiq/core-rs-albatross/commit/a530b2434ebca6e3716f07c73079786fcc6f2e41
    label: security-advisories@github.com
  - url: 'https://github.com/nimiq/core-rs-albatross/pull/3772'
    label: security-advisories@github.com
  - url: >-
      https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-3763-qp59-59vf
    label: security-advisories@github.com
  - url: 'https://github.com/advisories/GHSA-3763-qp59-59vf'
tags:
  - nvd
  - ghsa
  - rust
epss: 0.00549
epssPercentile: 0.43686
aliases:
  - GHSA-3763-qp59-59vf
ecosystem: rust
ingestedAt: '2026-08-12T15:53:06.013Z'
---

## Overview

Nimiq is a Rust implementation of the Nimiq Proof-of-Stake protocol based on the Albatross consensus algorithm. Through 1.5.0, the validity store uses a strict lower-bound comparison that expires a stored transaction too early relative to Transaction::is_valid_at, allowing a remote attacker to replay the same signed transaction during a blocks_per_batch minus one block window and cause the sender and recipient balances to be updated twice. This issue is fixed in version 1.5.1.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-46369)

Affected packages:

- `nimiq-blockchain <= 1.5.0`

Patched in:

- `nimiq-blockchain 1.5.1`

Source: https://github.com/advisories/GHSA-3763-qp59-59vf