Vulnerability-Lookup

CVE-2026-54542 (GCVE-0-2026-54542)

Vulnerability from cvelistv5 – Published: 2026-09-14 15:29 – Updated: 2026-09-14 20:07

Title

Nimiq: Out-of-bounds panic in KeyNibbles::Add from oversized child suffix in a deserialized proof

Summary

Nimiq is a Rust implementation of the Nimiq Proof-of-Stake protocol based on the Albatross consensus algorithm. Prior to 1.6.0, a malicious state-sync peer can crash a syncing node by sending a crafted TrieChunk whose proof contains a TrieNodeChild suffix that is individually valid but exceeds the 63-byte KeyNibbles backing array when combined with the parent key. KeyNibbles::Add in primitives/src/key_nibbles.rs performs the combined slice operation without checking the total length, and the input reaches put_chunk, TrieNodeChild::key, and TrieNodeChild::is_stump before proof.verify, so the attacker does not need a valid cryptographic proof. Exploitation requires the attacker to be selected as the victim's sync peer during state sync. The resulting out-of-bounds panic is transient because the node restarts and resynchronizes. This issue is fixed in version 1.6.0.

Severity

3.7 (Low)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/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 2026-09-14 19:20 UTC

CWE

CWE-125 - Out-of-bounds Read

Assigner

GitHub_M mitre root

References

4 references

URL	Tags
https://github.com/nimiq/core-rs-albatross/securi…	x_refsource_CONFIRM
https://github.com/nimiq/core-rs-albatross/pull/3790	x_refsource_MISC
https://github.com/nimiq/core-rs-albatross/commit…	x_refsource_MISC
https://github.com/nimiq/core-rs-albatross/releas…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
nimiq	core-rs-albatross	Affected: < 1.6.0	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-54542

Vulnerability from fkie_nvd - Published: 2026-09-14 16:17 - Updated: 2026-09-14 20:16

Severity

3.7 (Low) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/nimiq/core-rs-albatross/commit/eabfc3e21731b0628c3f933163a0f1e1864217bf
	security-advisories@github.com	https://github.com/nimiq/core-rs-albatross/pull/3790
	security-advisories@github.com	https://github.com/nimiq/core-rs-albatross/releases/tag/v1.6.0
	security-advisories@github.com	https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-5rg2-xv9j-gv5p

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "core-rs-albatross",
          "vendor": "nimiq",
          "versions": [
            {
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    }
  ],
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  "lastModified": "2026-09-14T20:16:46.453",
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GHSA-5RG2-XV9J-GV5P

Vulnerability from github – Published: 2026-07-16 20:03 – Updated: 2026-07-16 20:03

Summary

nimiq-primitives: Out-of-bounds panic in KeyNibbles::Add from oversized child suffix in a deserialized proof

Details

Impact

A malicious peer acting as a state-sync source can crash a syncing node with a crafted TrieChunk whose proof contains a TrieNodeChild whose suffix, when concatenated with the parent key via KeyNibbles::Add, exceeds the fixed 63-byte backing array. Add (primitives/src/key_nibbles.rs:332 / :341) indexes bytes[self.bytes_len()..self.bytes_len() + other.bytes_len()] with no combined-length check, causing an out-of-bounds slice panic (both the even- and odd-length branches).

KeyNibbles deserialization validates only the individual length <= 126, not the combined parent + suffix length. The panic occurs at put_chunk → child.key() → is_stump() → +, i.e. before proof.verify(), so no valid proof is required. As with the related child_index issue, exploitation requires being the victim's sync peer during state sync, and the resulting crash is transient (the node restarts and re-syncs).

Affected: core-rs-albatross <= 1.5.1 (nimiq-primitives).

Patches

Fixed in 1.6.0 via https://github.com/nimiq/core-rs-albatross/pull/3790 (commit eabfc3e2), which guards key-nibble concatenation against exceeding the maximum length instead of indexing out of bounds.

Workarounds

None other than syncing only from trusted peers. Upgrade to 1.6.0.

Severity

3.7 (Low)


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

Show details on source website

JSON

To clipboard

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      "package": {
        "ecosystem": "crates.io",
        "name": "nimiq-primitives"
      },
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    "github_reviewed": true,
    "github_reviewed_at": "2026-07-16T20:03:25Z",
    "nvd_published_at": null,
    "severity": "LOW"
  },
  "details": "### Impact\n\nA malicious peer acting as a state-sync source can crash a syncing node with a crafted `TrieChunk` whose proof contains a `TrieNodeChild` whose `suffix`, when concatenated with the parent key via `KeyNibbles::Add`, exceeds the fixed 63-byte backing array. `Add` (`primitives/src/key_nibbles.rs:332` / `:341`) indexes `bytes[self.bytes_len()..self.bytes_len() + other.bytes_len()]` with no combined-length check, causing an out-of-bounds slice panic (both the even- and odd-length branches).\n\n`KeyNibbles` deserialization validates only the individual `length \u003c= 126`, not the combined parent + suffix length. The panic occurs at `put_chunk` \u2192 `child.key()` \u2192 `is_stump()` \u2192 `+`, i.e. **before** `proof.verify()`, so no valid proof is required. As with the related `child_index` issue, exploitation requires being the victim\u0027s sync peer during state sync, and the resulting crash is transient (the node restarts and re-syncs).\n\nAffected: core-rs-albatross \u003c= 1.5.1 (`nimiq-primitives`).\n\n### Patches\n\nFixed in **1.6.0** via https://github.com/nimiq/core-rs-albatross/pull/3790 (commit `eabfc3e2`), which guards key-nibble concatenation against exceeding the maximum length instead of indexing out of bounds.\n\n### Workarounds\n\nNone other than syncing only from trusted peers. Upgrade to 1.6.0.",
  "id": "GHSA-5rg2-xv9j-gv5p",
  "modified": "2026-07-16T20:03:25Z",
  "published": "2026-07-16T20:03:25Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-5rg2-xv9j-gv5p"
    },
    {
      "type": "WEB",
      "url": "https://github.com/nimiq/core-rs-albatross/pull/3790"
    },
    {
      "type": "WEB",
      "url": "https://github.com/nimiq/core-rs-albatross/commit/eabfc3e21731b0628c3f933163a0f1e1864217bf"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/nimiq/core-rs-albatross"
    },
    {
      "type": "WEB",
      "url": "https://github.com/nimiq/core-rs-albatross/releases/tag/v1.6.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "nimiq-primitives: Out-of-bounds panic in KeyNibbles::Add from oversized child suffix in a deserialized proof"
}

Sightings

Author	Source	Type	Date	Other

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Detection rules are retrieved from Rulezet.

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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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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-54542 (GCVE-0-2026-54542)

FKIE_CVE-2026-54542

GHSA-5RG2-XV9J-GV5P

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