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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-54542
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-14 16:17:12 UTC
Updated2026-09-30 17:51:56 UTC
DescriptionNimiq 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.

Risk And Classification

Primary CVSS: v3.1 3.7 LOW from [email protected]

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

EPSS: 0.004430000 probability, percentile 0.360520000 (date 2026-09-29)

Problem Types: CWE-125 | CWE-125 CWE-125: Out-of-bounds Read

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary3.7LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
3.1CNADECLARED3.7LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Nimiq Core-rs-albatross affected < 1.6.0 Not specified

References

ReferenceSourceLinkTags
github.com/nimiq/core-rs-albatross/pull/3790 [email protected] github.com
github.com/nimiq/core-rs-albatross/security/advisories/GHSA-5rg2-xv9j-gv5p [email protected] github.com
github.com/nimiq/core-rs-albatross/releases/tag/v1.6.0 [email protected] github.com
github.com/nimiq/core-rs-albatross/commit/eabfc3e21731b0628c3f933163a0f1... [email protected] github.com
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