{"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":"### Impact\nA 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\".\n\n### Patches\n[The patch for this vulnerability](https://github.com/nimiq/core-rs-albatross/pull/3745) is formally released as part of [v1.5.0](https://github.com/nimiq/core-rs-albatross/releases/tag/v1.5.0).\n\n### Workarounds\nNo Workaround, although requesting the genesis batch set is not used during normal operation.\n\n### Resources\nSee [PR](https://github.com/nimiq/core-rs-albatross/pull/3745).","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":0.21773,"asOf":"2026-09-16"},"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"},{"type":"WEB","url":"https://github.com/nimiq/core-rs-albatross/commit/8e8b0abdb1b66f5e9b25b3833879f05c173a5596"},{"type":"PACKAGE","url":"https://github.com/nimiq/core-rs-albatross"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:30.919456681Z"}}