Vulnerability in Nimiq Proof-Of-Stake
CVE-2026-34067
nimiq-transaction provides the transaction primitive to be used in Nimiq's Rust implementation. Prior to version 1.3.0, `HistoryTreeProof::verify` panics on a malformed proof where `history.len() != positions.len()` due to `assert_eq!(history.len(), positions.len())`. The proof object is derived from untrusted p2p responses (`ResponseTransactionsProof.proof`) and is therefore attacker-controlled at the network boundary until validated. A malicious peer could trigger a crash by returning a crafted inclusion proof with a length mismatch. The patch for this vulnerability is included as part of v1.3.0. No known workarounds are available.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.1 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.003 (24.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 25th percentile — 24.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.003 · change: -0.001
Affected products
- Nimiq Proof-Of-Stake
- Nimiq Nimiq-Transaction — versions < 1.3.0
Weakness classification (CWE)
References
- github.com/nimiq/core-rs-albatross/security/advisories/GHSA-264v-m8fm-76jm (Patch, Vendor Advisory)
- github.com/nimiq/core-rs-albatross/pull/3659 (Patch, Issue Tracking)
- github.com/nimiq/core-rs-albatross/commit/6ff0800e8e031363e787c827d8d033e5694e4… (Patch)
- github.com/nimiq/core-rs-albatross/releases/tag/v1.3.0 (Release Notes)
Frequently asked questions
- What is CVE-2026-34067?
- CVE-2026-34067 is a low-severity vulnerability in Nimiq Proof-Of-Stake, classified under Reachable Assertion. CVSS score: 3.1/10. Published 2026-04-22.
- How severe is CVE-2026-34067?
- Low severity. CVSS v3 base score is 3.1 out of 10.