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CVE-2026-54542— Nimiq: Out-of-bounds panic in KeyNibbles::Add from oversized child suffix in a deserialized proof

Quick assessment

Affected
nimiq core-rs-albatross
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Nimiq core-rs-albatross是Nimiq组织开源的一款基于Rust实现区块链共识与网络节点服务的系统软件。 Nimiq core-rs-albatross 1.6.0之前版本存在缓冲区错误漏洞，该漏洞源于恶意状态同步节点发送特制的TrieChunk，其证明包含的TrieNodeChild后缀与父键组合后超出63字节的KeyNibbles数组长度，KeyNibbles::Add未检查总长度即执行切片操作，可能导致同步节点越界恐慌崩溃。

CVSS 3.7 · Low EPSS 0.44% · P39

Affected Version Matrix 1

VendorProduct Version RangeStatus
nimiq core-rs-albatross < 1.6.0 affected
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I. Basic Information for CVE-2026-54542

Vulnerability Information
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Vulnerability Title
Nimiq: Out-of-bounds panic in KeyNibbles::Add from oversized child suffix in a deserialized proof
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
Nimiq core-rs-albatross 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Nimiq core-rs-albatross是Nimiq组织开源的一款基于Rust实现区块链共识与网络节点服务的系统软件。 Nimiq core-rs-albatross 1.6.0之前版本存在缓冲区错误漏洞，该漏洞源于恶意状态同步节点发送特制的TrieChunk，其证明包含的TrieNodeChild后缀与父键组合后超出63字节的KeyNibbles数组长度，KeyNibbles::Add未检查总长度即执行切片操作，可能导致同步节点越界恐慌崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
nimiq core-rs-albatross < 1.6.0 -

II. Public POCs for CVE-2026-54542

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III. Intelligence Information for CVE-2026-54542

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Patches & Fixes for CVE-2026-54542 (2)

Vendor Advisories for CVE-2026-54542 (1)

Vendor Pages for CVE-2026-54542 (1)

IV. Related Vulnerabilities

Same product: core-rs-albatross
Same vendor: nimiq
Same weakness: CWE-125