Vulnerability · Published Jun 9, 2026 · Assigned by GitHub_M

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

Medium 5.3

In plain English

A medium-severity security flaw in core-rs-albatross from nimiq. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 22% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.3%top 78.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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 products (as reported)

Vendor	Product	Versions
nimiq	core-rs-albatross	< 1.5.0

Weakness: CWE-617 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References

https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-vghx-352f-93jm x_refsource_CONFIRM
https://github.com/nimiq/core-rs-albatross/pull/3745 x_refsource_MISC
https://github.com/nimiq/core-rs-albatross/releases/tag/v1.5.0 x_refsource_MISC