What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-10 · updated 2026-07-23
• Weakness: CWE-617

Description

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 products

• nimiq core-rs-albatross: before 1.4.0

References

• https://github.com/nimiq/core-rs-albatross/pull/3713
• https://github.com/nimiq/core-rs-albatross/releases/tag/v1.4.0
• https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-h9cc-w26m-j342

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