CVE-2026-34061 (GCVE-0-2026-34061)
Vulnerability from cvelistv5
Published
2026-04-03 22:07
Modified
2026-04-06 15:42
Severity ?
4.9 (Medium) - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-345 - Insufficient Verification of Data Authenticity
Summary
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.
References
Impacted products
Vendor Product Version
nimiq core-rs-albatross Version: < 1.3.0
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-34061",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-06T15:37:16.058073Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-06T15:42:21.027Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "core-rs-albatross",
          "vendor": "nimiq",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.3.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 4.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "HIGH",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-345",
              "description": "CWE-345: Insufficient Verification of Data Authenticity",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-03T22:07:40.969Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-gr83-j5f8-p2r5",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-gr83-j5f8-p2r5"
        },
        {
          "name": "https://github.com/nimiq/core-rs-albatross/pull/3668",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/nimiq/core-rs-albatross/pull/3668"
        },
        {
          "name": "https://github.com/nimiq/core-rs-albatross/commit/9d7d17c9163384e79f61cdbbfe9853ae57bb8bf7",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/nimiq/core-rs-albatross/commit/9d7d17c9163384e79f61cdbbfe9853ae57bb8bf7"
        },
        {
          "name": "https://github.com/nimiq/core-rs-albatross/releases/tag/v1.3.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/nimiq/core-rs-albatross/releases/tag/v1.3.0"
        }
      ],
      "source": {
        "advisory": "GHSA-gr83-j5f8-p2r5",
        "discovery": "UNKNOWN"
      },
      "title": "nimiq/core-rs-albatross: Macro block proposal interlink bug"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-34061",
    "datePublished": "2026-04-03T22:07:40.969Z",
    "dateReserved": "2026-03-25T16:21:40.866Z",
    "dateUpdated": "2026-04-06T15:42:21.027Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-34061\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-04-06T15:37:16.058073Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-04-06T15:37:20.339Z\"}}], \"cna\": {\"title\": \"nimiq/core-rs-albatross: Macro block proposal interlink bug\", \"source\": {\"advisory\": \"GHSA-gr83-j5f8-p2r5\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 4.9, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"HIGH\", \"confidentialityImpact\": \"NONE\"}}], \"affected\": [{\"vendor\": \"nimiq\", \"product\": \"core-rs-albatross\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003c 1.3.0\"}]}], \"references\": [{\"url\": \"https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-gr83-j5f8-p2r5\", \"name\": \"https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-gr83-j5f8-p2r5\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/nimiq/core-rs-albatross/pull/3668\", \"name\": \"https://github.com/nimiq/core-rs-albatross/pull/3668\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/nimiq/core-rs-albatross/commit/9d7d17c9163384e79f61cdbbfe9853ae57bb8bf7\", \"name\": \"https://github.com/nimiq/core-rs-albatross/commit/9d7d17c9163384e79f61cdbbfe9853ae57bb8bf7\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/nimiq/core-rs-albatross/releases/tag/v1.3.0\", \"name\": \"https://github.com/nimiq/core-rs-albatross/releases/tag/v1.3.0\", \"tags\": [\"x_refsource_MISC\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"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.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-345\", \"description\": \"CWE-345: Insufficient Verification of Data Authenticity\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-04-03T22:07:40.969Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-34061\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-04-06T15:42:21.027Z\", \"dateReserved\": \"2026-03-25T16:21:40.866Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2026-04-03T22:07:40.969Z\", \"assignerShortName\": \"GitHub_M\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.