GHSA-VGHX-352F-93JM

Vulnerability from github – Published: 2026-05-21 19:46 – Updated: 2026-05-21 19:46
VLAI
Summary
nimiq-blockchain: Genesis batch set request
Details

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 is formally released as part of v1.5.0.

Workarounds

No Workaround, although requesting the genesis batch set is not used during normal operation.

Resources

See PR.

Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
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{
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "nimiq-blockchain"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.5.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-46543"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-617"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-21T19:46:15Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "### Impact\nA remote peer can crash any full node by sending a RequestBatchSet message containing the genesis block\u0027s 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).",
  "id": "GHSA-vghx-352f-93jm",
  "modified": "2026-05-21T19:46:15Z",
  "published": "2026-05-21T19:46:15Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-vghx-352f-93jm"
    },
    {
      "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"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "nimiq-blockchain: Genesis batch set request"
}


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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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