{"id":"CVE-2026-46543","aliases":["GHSA-vghx-352f-93jm"],"url":"https://o3.security/vulnerability/CVE-2026-46543","summary":"nimiq-blockchain: Genesis batch set request","details":"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.","published":"2026-06-09T23:47:32.019Z","modified":"2026-08-12T03:51:30.919456681Z","cvss":{"score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},"epss":{"score":0.00291,"percentile":0.2165,"asOf":"2026-08-18"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"crates.io","name":"nimiq-blockchain","fixedVersion":"1.5.0"}],"fix":{"url":"https://github.com/nimiq/core-rs-albatross/pull/3745","label":"nimiq/core-rs-albatross#3745"},"references":[{"type":"WEB","url":"https://github.com/nimiq/core-rs-albatross/releases/tag/v1.5.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46543.json"},{"type":"ADVISORY","url":"https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-vghx-352f-93jm"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46543"},{"type":"FIX","url":"https://github.com/nimiq/core-rs-albatross/pull/3745"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:30.919456681Z"}}