Medium 5.3Published Apr 22, 2026

CVE-2026-34066nimiq-blockchain provides persistent block storage for Nimiq's Rust implementation.

Updated under an hour ago (2026-10-19 10:23 UTC)

Does this affect you?

It affects nimiq_proof-of-stake. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for nimiq_proof-of-stake

Exploited in the last 30 days

nimiq-blockchain provides persistent block storage for Nimiq's Rust implementation. Prior to version 1.3.0, `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. The patch for this vulnerability is included as part of v1.3.0. No known workarounds are available.

CVSS: 5.3 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-20, CWE-617, CWE-754
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Analyzed
Record last updated: Jun 17, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

nimiq nimiq_proof-of-stake nimiq:nimiq_proof-of-stake	before 1.3.0	NVD

References

https://github.com/nimiq/core-rs-albatross/commit/6f5511309c199d84b012fe6b9aba7e5582892c50patch
https://github.com/nimiq/core-rs-albatross/pull/3656issue-tracking, patch
https://github.com/nimiq/core-rs-albatross/releases/tag/v1.3.0release-notes
https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-j99g-7rqw-q9jgpatch, vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.