CVE-2026-34066
MEDIUM5.3EPSS 0.13%nimiq-blockchain: Peer-triggerable panic during history sync
Description
### Impact `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. `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. ### Patches [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). ### Workarounds No known workarounds.
Affected packages (1)
- crates.io/nimiq-blockchainfrom 0, <= 0.2.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.3 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H |
References (6)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2026-34066
- PATCHhttps://github.com/nimiq/core-rs-albatross
- WEBhttps://github.com/nimiq/core-rs-albatross/commit/6f5511309c199d84b012fe6b9aba7e5582892c50
- WEBhttps://github.com/nimiq/core-rs-albatross/pull/3656
- WEBhttps://github.com/nimiq/core-rs-albatross/releases/tag/v1.3.0
- WEBhttps://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-j99g-7rqw-q9jg