PT-2026-42671 · Crates.Io · Nimiq-Blockchain

Published 2026-05-21 · Updated 2026-05-21 · CVE-2026-46543

OSV

CVSS v3.1

5.3

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Impact

A remote peer can crash any full node by sending a RequestBatchSet message containing the genesis block's hash. The handler calls get epoch chunks which iterates backwards through macro blocks using Policy::macro block before. When it reaches the genesis block number, macro block before panics with "No macro blocks before genesis block".

Patches

The patch for this vulnerability is formally released as part of v1.5.0.

Workarounds

No Workaround, although requesting the genesis batch set is not used during normal operation.

Resources

See PR.

Fix

Assertion Failure

Weakness Enumeration

CWE-617

Related Identifiers

CVE-2026-46543

GHSA-VGHX-352F-93JM

Affected Products

Nimiq-Blockchain

References · 6

• https://osv.dev/vulnerability/GHSA-vghx-352f-93jm · Vendor Advisory
• https://github.com/nimiq/core-rs-albatross · Note
• https://github.com/nimiq/core-rs-albatross/pull/3745 · Note
• https://github.com/nimiq/core-rs-albatross/releases/tag/v1.5.0 · Note
• https://github.com/nimiq/core-rs-albatross/commit/8e8b0abdb1b66f5e9b25b3833879f05c173a5596 · Note
• https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-vghx-352f-93jm · Note