Vulnerability in Nimiq Core-Rs-Albatross
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.
EPSS: 0.003 (21.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
Affected products
- Nimiq Core-rs-albatross — versions < 1.5.0
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_CONFIRM)
Frequently asked questions
- What is CVE-2026-46543?
- CVE-2026-46543 is a medium-severity vulnerability in Nimiq Core-Rs-Albatross, classified under Reachable Assertion. CVSS score: 5.3/10. Published 2026-06-10.
- How severe is CVE-2026-46543?
- Medium severity. CVSS v3 base score is 5.3 out of 10.