{"id":"GHSA-j99g-7rqw-q9jg","summary":"nimiq-blockchain: Peer-triggerable panic during history sync","details":"### Impact\n`HistoryStore::put_historic_txns` uses an `assert!` to enforce invariants about `HistoricTransaction.block_number` (must be within the macro block being pushed and within the same epoch). During history sync, a peer can influence the `history: &[HistoricTransaction]` input passed into `Blockchain::push_history_sync`, and a malformed history list can violate these invariants and trigger a panic.\n\n`extend_history_sync` calls `this.history_store.add_to_history(..)` before comparing the computed history root against the macro block header (`block.history_root()`), so the panic can happen before later rejection checks run.\n\n### Patches\n[The patch for this vulnerability](https://github.com/nimiq/core-rs-albatross/commit/6f5511309c199d84b012fe6b9aba7e5582892c50) is included as part of [v1.3.0](https://github.com/nimiq/core-rs-albatross/releases/tag/v1.3.0).\n\n### Workarounds\nNo known workarounds.","aliases":["CVE-2026-34066"],"modified":"2026-05-05T16:10:37.181861Z","published":"2026-04-22T19:23:55Z","database_specific":{"cwe_ids":["CWE-20","CWE-617","CWE-754"],"severity":"MODERATE","github_reviewed":true,"github_reviewed_at":"2026-04-22T19:23:55Z","nvd_published_at":"2026-04-22T20:16:41Z"},"references":[{"type":"WEB","url":"https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-j99g-7rqw-q9jg"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-34066"},{"type":"WEB","url":"https://github.com/nimiq/core-rs-albatross/pull/3656"},{"type":"WEB","url":"https://github.com/nimiq/core-rs-albatross/commit/6f5511309c199d84b012fe6b9aba7e5582892c50"},{"type":"PACKAGE","url":"https://github.com/nimiq/core-rs-albatross"},{"type":"WEB","url":"https://github.com/nimiq/core-rs-albatross/releases/tag/v1.3.0"}],"affected":[{"package":{"name":"nimiq-blockchain","ecosystem":"crates.io","purl":"pkg:cargo/nimiq-blockchain"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"last_affected":"0.2.0"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-j99g-7rqw-q9jg/GHSA-j99g-7rqw-q9jg.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H"}]}