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CVE-2026-40092— nimiq-keys: Unchecked Ed25519 signature length in TaggedPublicKey::verify causes remote node panic via DHT

CVSS 7.5 · High EPSS 0.03% · P8

Possible ATT&CK Techniques 1AI

T1498 · Network Denial of Service

Affected Version Matrix 1

VendorProductVersion RangeStatus
nimiqcore-rs-albatross< 1.4.0affected
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I. Basic Information for CVE-2026-40092

Vulnerability Information
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Vulnerability Title
nimiq-keys: Unchecked Ed25519 signature length in TaggedPublicKey::verify causes remote node panic via DHT
Source: NVD (National Vulnerability Database)
Vulnerability Description
nimiq-blockchain provides persistent block storage for Nimiq's Rust implementation. In versions 1.3.0 and below, a malicious network peer can crash any Nimiq full node by publishing a crafted Kademlia DHT record. The maliciously crafted record would contain a TaggedSigned<ValidatorRecord, KeyPair> with a signature field whose byte length is not exactly 64 in order to cause a crash. When the victim node's DHT verifier calls TaggedSigned::verify, execution reaches Ed25519Signature::from_bytes(sig).unwrap() in the TaggedPublicKey implementation for Ed25519PublicKey. The from_bytes call fails because ed25519_zebra::Signature::try_from rejects slices not 64 bytes, and the unwrap() panics. The BLS TaggedPublicKey implementation correctly returns false on error; only the Ed25519 implementation panics. This issue has been fixed in version 1.4.0.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
未加检查的返回值
Source: NVD (National Vulnerability Database)
Vulnerability Title
Nimiq 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Nimiq是Nimiq开源的一个Albatross协议的Rust实现。 Nimiq 1.3.0及之前版本存在安全漏洞，该漏洞源于恶意网络对等节点发布特制的Kademlia DHT记录，其中签名字段字节长度不为64，导致Ed25519Signature::from_bytes调用失败并触发unwrap()恐慌，从而崩溃任何Nimiq全节点。
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

VendorProductAffected VersionsCPESubscribe
nimiqcore-rs-albatross < 1.4.0 -

II. Public POCs for CVE-2026-40092

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
Qwen3.6-35B-A3B · 6927 chars
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III. Intelligence Information for CVE-2026-40092

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Patches & Fixes for CVE-2026-40092 (2)

Vendor Advisories for CVE-2026-40092 (1)

Vendor Pages for CVE-2026-40092 (1)

IV. Related Vulnerabilities

Same product: core-rs-albatross
Same vendor: nimiq
Same weakness: CWE-252

V. Comments for CVE-2026-40092

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