nimiq-blockchain: Genesis batch set request
CVE-2026-46543

5.3MEDIUM

Key Information:

Vendor

Nimiq

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

What is CVE-2026-46543?

Nimiq is a Rust implementation of the Nimiq Proof-of-Stake protocol based on the Albatross consensus algorithm. Prior to version 1.5.0, 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". This issue has been patched in version 1.5.0.

Affected Version(s)

core-rs-albatross < 1.5.0

References

https://github.com/nimiq/core-rs-albatross/security/advis...
x_refsource_CONFIRM
https://github.com/nimiq/core-rs-albatross/pull/3745
x_refsource_MISC
https://github.com/nimiq/core-rs-albatross/releases/tag/v...
x_refsource_MISC

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.