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Vulnerability record · CVE-2026-34065 · published 22 April 2026

CVE-2026-34065: Nimiq proof-of-stake unchecked return value vulnerability

Nimiq · Nimiq Proof Of Stake

nimiq-primitives contains primitives (e.g., block, account, transaction) to be used in Nimiq's Rust implementation. Prior to version 1.3.0, an untrusted p2p peer can cause a node to panic by announcing an election macro block whose `validators` set contains an invalid compressed BLS voting key. Hashing an election macro header hashes `validators` and reaches `Validators::voting_keys()`, which calls `validator.voting_key.uncompress().unwrap()` and panics on invalid bytes. The patch for this vulnerability is included as part of v1.3.0. No known workarounds are available.

7.5 CVSS 3.1 High EPSS 0.62% · top 52.4% CWE-252 · Unchecked return valueCWE-755 · CWE-755
7.5CVSS 3.1 base score
0.62%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

nimiq-primitives contains primitives (e.g., block, account, transaction) to be used in Nimiq's Rust implementation. Prior to version 1.3.0, an untrusted p2p peer can cause a node to panic by announcing an election macro block whose `validators` set contains an invalid compressed BLS voting key. Hashing an election macro header hashes `validators` and reaches `Validators::voting_keys()`, which calls `validator.voting_key.uncompress().unwrap()` and panics on invalid bytes. The patch for this vulnerability is included as part of v1.3.0. No known workarounds are available.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/nimiq/core-rs-albatross/commit/e10eaebcd7774e5da6d0ff5e88ed13503474f0ff Patch
https://github.com/nimiq/core-rs-albatross/pull/3662 Issue TrackingPatch
https://github.com/nimiq/core-rs-albatross/releases/tag/v1.3.0 Release Notes
https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-7c4j-2m43-2mgh PatchVendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2026-34065), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.