🛡️ CVE-2026-46542 — nimiq-keys

🟡 CVSS 4.3 — Medium ✅ No Known Exploit CWE-617 NVD
4.3
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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

Impact

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.

A secondary panic existed in Commitment::From<[u8; 32]>, which similarly called .unwrap() on a failing curve point decompression.

Who is affected: Browser and desktop wallet users of the web-client WASM library and the nimiq-wallet crate, when initiating a multisig operation with an attacker-supplied public key. An attacker must convince the user to include

a crafted public key in a multisig setup — this is not a remotely triggerable node/validator crash.

Who is NOT affected: Validator nodes, consensus, blockchain, mempool, and networking code. There is no on-chain multisig account type; multisig is a purely client-side construct, and no validator/consensus code calls the multisig delinearization path.

Patches

See [PR](https://github.com/nimiq/core-rs-albatross/pull/3713).

Workarounds

No code-level workaround exists short of the patch. Users of wallet applications can mitigate exposure by only performing multisig operations with public keys received from trusted sources.

Resources

  • Affected code: keys/src/multisig/mod.rs, keys/src/multisig/commitment.rs

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability low.

Affected software

CVE-2026-46542 is recorded against 2 packages.

  • nimiq-keys
  • unknown

Timeline and source

Published on 21 May 2026 and last revised on 10 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

github.com (Web)
nvd.nist.gov (Advisory)
github.com (Web)
github.com (Web)
github.com (Package)
github.com (Web)

Details

Severity Medium
CVSS Score 4.3
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
CWE CWE-617
Public Exploit ✅ No
Source NVD
Published 2026-05-21
Updated 2026-08-12
Modified 2026-06-10
Fix URL N/A

Affected Packages

Software From version Fixed in
nimiq-keys — —
unknown — —

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