Vulnerability-Lookup

GHSA-H9CC-W26M-J342

Vulnerability from github – Published: 2026-05-21 19:45 – Updated: 2026-06-10 13:41

Summary

nimiq-keys: Denial of service in Ed25519 multisig delinearization via invalid curve points

Details

Impact

A denial-of-service vulnerability exists in the Ed25519 multisig delinearization code path. Ed25519PublicKey::delinearize() in keys/src/multisig/mod.rs called .unwrap() on curve point decompression, which panics when a public key is constructed from 32 bytes that do not represent a valid point on the Ed25519 curve. Ed25519PublicKey construction only validates byte length, not curve membership, so invalid keys can reach the delinearization path and crash the hosting process.

A secondary panic existed in Commitment::From<[u8; 32]>, which similarly called .unwrap() on a failing curve point decompression.

Who is affected: Browser and desktop wallet users of the web-client WASM library and the nimiq-wallet crate, when initiating a multisig operation with an attacker-supplied public key. An attacker must convince the user to include a crafted public key in a multisig setup — this is not a remotely triggerable node/validator crash.

Who is NOT affected: Validator nodes, consensus, blockchain, mempool, and networking code. There is no on-chain multisig account type; multisig is a purely client-side construct, and no validator/consensus code calls the multisig delinearization path.

Patches

See PR.

Workarounds

No code-level workaround exists short of the patch. Users of wallet applications can mitigate exposure by only performing multisig operations with public keys received from trusted sources.

Resources

Affected code: keys/src/multisig/mod.rs, keys/src/multisig/commitment.rs

Severity

4.3 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

Show details on source website

JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "nimiq-keys"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.4.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-46542"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-617"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-21T19:45:08Z",
    "nvd_published_at": "2026-06-10T00:16:54Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\n\nA denial-of-service vulnerability exists in the Ed25519 multisig delinearization code path. `Ed25519PublicKey::delinearize()` in `keys/src/multisig/mod.rs` called `.unwrap()` on curve point decompression, which panics when a public key is\nconstructed from 32 bytes that do not represent a valid point on the Ed25519 curve. `Ed25519PublicKey` construction only validates byte length, not curve membership, so invalid keys can reach the delinearization path and crash the\nhosting process.\n\nA secondary panic existed in `Commitment::From\u003c[u8; 32]\u003e`, which similarly called `.unwrap()` on a failing curve point decompression.\n\n**Who is affected:** Browser and desktop wallet users of the web-client WASM library and the `nimiq-wallet` crate, when initiating a multisig operation with an attacker-supplied public key. An attacker must convince the user to include\na crafted public key in a multisig setup \u2014 this is not a remotely triggerable node/validator crash.\n\n**Who is NOT affected:** Validator nodes, consensus, blockchain, mempool, and networking code. There is no on-chain multisig account type; multisig is a purely client-side construct, and no validator/consensus code calls the multisig  delinearization path.\n\n### Patches\n\nSee [PR](https://github.com/nimiq/core-rs-albatross/pull/3713).\n\n### Workarounds\n\nNo code-level workaround exists short of the patch. Users of wallet applications can mitigate exposure by only performing multisig operations with public keys received from trusted sources.\n\n### Resources\n- Affected code: `keys/src/multisig/mod.rs`, `keys/src/multisig/commitment.rs`",
  "id": "GHSA-h9cc-w26m-j342",
  "modified": "2026-06-10T13:41:32Z",
  "published": "2026-05-21T19:45:08Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-h9cc-w26m-j342"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46542"
    },
    {
      "type": "WEB",
      "url": "https://github.com/nimiq/core-rs-albatross/pull/3713"
    },
    {
      "type": "WEB",
      "url": "https://github.com/nimiq/core-rs-albatross/commit/3bc449a8138960c4de6bfd506bad1730c621d4de"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/nimiq/core-rs-albatross"
    },
    {
      "type": "WEB",
      "url": "https://github.com/nimiq/core-rs-albatross/releases/tag/v1.4.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "nimiq-keys: Denial of service in Ed25519 multisig delinearization via invalid curve points"
}

CVE-2026-46542 (GCVE-0-2026-46542)

Vulnerability from cvelistv5 – Published: 2026-06-09 23:46 – Updated: 2026-06-10 13:11

Title

nimiq-keys: Denial of service in Ed25519 multisig delinearization via invalid curve points

Summary

Nimiq is a Rust implementation of the Nimiq Proof-of-Stake protocol based on the Albatross consensus algorithm. Prior to version 1.4.0, a denial-of-service vulnerability exists in the Ed25519 multisig delinearization code path. Ed25519PublicKey::delinearize() in keys/src/multisig/mod.rs called .unwrap() on curve point decompression, which panics when a public key is constructed from 32 bytes that do not represent a valid point on the Ed25519 curve. Ed25519PublicKey construction only validates byte length, not curve membership, so invalid keys can reach the delinearization path and crash the hosting process. This issue has been patched in version 1.4.0.

Severity

4.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-10 13:10 UTC

CWE

CWE-617 - Reachable Assertion

Assigner

GitHub_M mitre root

References

3 references

URL	Tags
https://github.com/nimiq/core-rs-albatross/securi…	x_refsource_CONFIRM
https://github.com/nimiq/core-rs-albatross/pull/3713	x_refsource_MISC
https://github.com/nimiq/core-rs-albatross/releas…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
nimiq	core-rs-albatross	Affected: < 1.4.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
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                "id": "CVE-2026-46542",
                "options": [
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                    "Exploitation": "none"
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                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-10T13:10:51.570876Z",
                "version": "2.0.3"
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        }
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      "metrics": [
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            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
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            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L",
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
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Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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