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    <lastBuildDate>Tue, 06 Oct 2026 00:43:00 +0000</lastBuildDate>
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      <title>CVE-2026-40092 — nimiq-keys: Unchecked Ed25519 signature length in TaggedPublicKey::verify causes remote node panic via DHT</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2026-40092</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; nimiq core-rs-albatross&lt;/p&gt;
&lt;p&gt;nimiq-blockchain provides persistent block storage for Nimiq&amp;#39;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&amp;lt;ValidatorRecord, KeyPair&amp;gt; with a signature field whose byte length is not exactly 64 in order to cause a crash. When the victim node&amp;#39;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.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; nimiq core-rs-albatross&lt;/p&gt;
&lt;p&gt;nimiq-blockchain provides persistent block storage for Nimiq&amp;#39;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&amp;lt;ValidatorRecord, KeyPair&amp;gt; with a signature field whose byte length is not exactly 64 in order to cause a crash. When the victim node&amp;#39;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.&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://cve.radiocsirt.org/vuln/cve-2026-40092</guid>
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