nimiq-keys: Denial of service in Ed25519 multisig delinearization via invalid curve points
CVE-2026-46542

4.3MEDIUM

Key Information:

Vendor

Nimiq

Status
Core-rs-albatross
Vendor
CVE Published:
9 June 2026

What is CVE-2026-46542?

Nimiq is a Rust implementation of the Nimiq Proof-of-Stake protocol based on the Albatross consensus algorithm. Prior to version 1.4.0, a denial-of-service vulnerability exists in the Ed25519 multisig delinearization code path. Ed25519PublicKey::delinearize() in keys/src/multisig/mod.rs called .unwrap() on curve point decompression, which panics when a public key is constructed from 32 bytes that do not represent a valid point on the Ed25519 curve. Ed25519PublicKey construction only validates byte length, not curve membership, so invalid keys can reach the delinearization path and crash the hosting process. This issue has been patched in version 1.4.0.

Affected Version(s)

core-rs-albatross < 1.4.0

References

https://github.com/nimiq/core-rs-albatross/security/advis...
x_refsource_CONFIRM
https://github.com/nimiq/core-rs-albatross/pull/3713
x_refsource_MISC
https://github.com/nimiq/core-rs-albatross/releases/tag/v...
x_refsource_MISC

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.