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Vulnerabilities

Vulnerability · CVE-2026-40092

nimiq-blockchain provides persistent block storage for Nimiq's Rust implementation.

Published May 20, 2026 · catalog updated Jul 23, 2026 · nimiq-blockchain provides persistent block

Check if you run it

No confirmed exploitation is on record for CVE-2026-40092. EPSS is 0.76%. Act only if a listed version of nimiq-blockchain provides persistent block is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (nimiq-blockchain provides persistent block).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.76%
Remediation
Advisory link
Affected products
See sources for product scope

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 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.

No affected version ranges are stored yet. Use the vendor advisory before you decide this record does not apply.

How to fix CVE-2026-40092

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-40092. EPSS is 0.76%. Act only if a listed version of nimiq-blockchain provides persistent block is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-252: Unchecked Return Value. EPSS 0.76%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. May 20, 2026 · NIST NVD

    Detected

    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 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

  2. Jul 23, 2026 · NIST NVD

    Updated

    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 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

Sources

  • CVE.orgVulnerability recordCVE-2026-40092

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-40092

    30-day exploitation probability 0.8%

    first.org
  • NIST NVDVulnerability recordCVE-2026-40092

    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<Validat

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.