High 7.5Published May 20, 2026

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

Updated under an hour ago (Oct 27, 2026, 4:50 AM ET)

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Every CVE for nimiq core-rs-albatross

Exploited in the last 30 days

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.

CVSS: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-252
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: May 21, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

nimiq core-rs-albatross nimiq:core_rs_albatross (from the name)	before 1.4.0	CNA record

References

References

https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-27w2-87xv-37c6	x-refsource-confirm
https://github.com/nimiq/core-rs-albatross/pull/3708	x-refsource-misc
https://github.com/nimiq/core-rs-albatross/commit/807ee8e99a7ccdc604d49971f292854bfa36754d	x-refsource-misc
https://github.com/nimiq/core-rs-albatross/releases/tag/v1.4.0	x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.