CVE-2026-46543: nimiq-blockchain Genesis Batch Set Request Vulnerability

MODERATE
Advisory Identifier: GHSA-vghx-352f-93jm
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CVSS 5.3
CWE-617
Published
Advisory Summary

CVE-2026-46543 is a MODERATE (CVSS 5.3) genesis batch set request vulnerability (CWE-617: Reachable Assertion) affecting nimiq-blockchain libraries in the crates.io ecosystem. The issue involves genesis batch set request. Remediation is available by upgrading affected packages to version 1.5.0.

CVE-2026-46543 at a Glance

CVE Identifier CVE-2026-46543
GHSA Identifier GHSA-vghx-352f-93jm
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification CWE-617: Reachable Assertion
Affected Product nimiq-blockchain
Package Ecosystem crates.io
Published Date
Last Updated

Security Impact

CVSS: 5.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability Low (A:L)

How to Fix CVE-2026-46543

To remediate this vulnerability, upgrade all affected nimiq-blockchain dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

nimiq-blockchain fixed: 1.5.0 
Upgrade nimiq-blockchain to 1.5.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for nimiq-blockchain

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-46543, inspect your project dependencies for nimiq-blockchain:

inspect dependencies for nimiq-blockchain

Analyze the terminal output to locate any version of nimiq-blockchain in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.5.0), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-617: Reachable Assertion, where the product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary. In nimiq-blockchain, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Impact A remote peer can crash any full node by sending a RequestBatchSet message containing the genesis block's hash. The handler calls `get_epoch_chunks` which iterates backwards through macro blocks using `Policy::macro_block_before`. When it reaches the genesis block number, `macro_block_before` panics with "No macro blocks before genesis block". ### Patches [The patch for this vulnerability](https://github.com/nimiq/core-rs-albatross/pull/3745) is formally released as part of [v1.5.0](https://github.com/nimiq/core-rs-albatross/releases/tag/v1.5.0). ### Workarounds No Workaround, although requesting the genesis batch set is not used during normal operation. ### Resources See [PR](https://github.com/nimiq/core-rs-albatross/pull/3745).

CVE-2026-46543 Affected nimiq-blockchain Versions

1 component(s)
Fixed Versions:
1.5.0
Product / Package Ecosystem Affected Versions Fixed Version
nimiq-blockchain
 crates.io
< 1.5.0
1.5.0

References

GitHub Advisory / Wiki ADVISORY
https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-vghx-352f-93jm
NVD — CVE-2026-46543 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-46543
nimiq-blockchain Source Repository REPOSITORY
https://github.com/nimiq/core-rs-albatross/pull/3745
Security Fix Commit FIX COMMIT
https://github.com/nimiq/core-rs-albatross/commit/8e8b0abdb1b66f5e9b25b3833879f05c173a5596
nimiq-blockchain Source Repository REPOSITORY
https://github.com/nimiq/core-rs-albatross
nimiq-blockchain Release RELEASE
https://github.com/nimiq/core-rs-albatross/releases/tag/v1.5.0

Frequently Asked Questions

What is CVE-2026-46543?
CVE-2026-46543 is a security vulnerability in nimiq-blockchain involving Genesis batch set request under CWE-617: Reachable Assertion.
Which nimiq-blockchain versions are affected?
Affected versions include releases prior to 1.5.0 across affected packages: nimiq-blockchain.
What version fixes CVE-2026-46543?
Upgrading to 1.5.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is nimiq-blockchain affected?
Yes, nimiq-blockchain is affected in releases prior to 1.5.0. Upgrade your dependency to 1.5.0 or later.
What is the CVSS score of CVE-2026-46543?
CVE-2026-46543 has a CVSS v3.1 base score of 5.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
What CWE is associated with CVE-2026-46543?
CVE-2026-46543 is classified under CWE-617: Reachable Assertion (The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary.).
How can I check crates.io dependencies for CVE-2026-46543?
Run the dependency tree command: 'inspect dependencies for nimiq-blockchain'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-vghx-352f-93jm",
  "modified" : "2026-06-10T13:41:37Z",
  "published" : "2026-05-21T19:46:15Z",
  "aliases" : [ "CVE-2026-46543" ],
  "summary" : "nimiq-blockchain: Genesis batch set request",
  "details" : "### Impact\nA remote peer can crash any full node by sending a RequestBatchSet message containing the genesis block's hash. The handler calls `get_epoch_chunks` which iterates backwards through macro blocks using `Policy::macro_block_before`. When it reaches the genesis block number, `macro_block_before` panics with \"No macro blocks before genesis block\".\n\n### Patches\n[The patch for this vulnerability](https://github.com/nimiq/core-rs-albatross/pull/3745) is formally released as part of [v1.5.0](https://github.com/nimiq/core-rs-albatross/releases/tag/v1.5.0).\n\n### Workarounds\nNo Workaround, although requesting the genesis batch set is not used during normal operation.\n\n### Resources\nSee [PR](https://github.com/nimiq/core-rs-albatross/pull/3745).",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "nimiq-blockchain"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.5.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-vghx-352f-93jm"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-46543"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/nimiq/core-rs-albatross/pull/3745"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/nimiq/core-rs-albatross/commit/8e8b0abdb1b66f5e9b25b3833879f05c173a5596"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/nimiq/core-rs-albatross"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/nimiq/core-rs-albatross/releases/tag/v1.5.0"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-617" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-05-21T19:46:15Z",
    "nvd_published_at" : "2026-06-10T00:16:54Z"
  }
}