CVE-2026-34066

5.3 MEDIUM
Published: April 22, 2026 Modified: April 24, 2026
View on NVD

Description

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://github.com/nimiq/core-rs-albatross/pull/3656
Source: security-advisories@github.com
Issue Tracking Patch
https://github.com/nimiq/core-rs-albatross/releases/tag/v1.3.0
Source: security-advisories@github.com
Release Notes
https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-j99g-7rqw-q9jg
Source: security-advisories@github.com
Patch Vendor Advisory

4 reference(s) from NVD

Quick Stats

CVSS v3 Score
5.3 / 10.0
EPSS (Exploit Probability)
0.1%
30th percentile
Exploitation Status
Not in CISA KEV

Affected Vendors

nimiq