Medium 5.3Published Apr 13, 2026

CVE-2026-34069nimiq-consensus panics via RequestMacroChain micro-block locator

Updated under an hour ago (Oct 26, 2026, 1:00 PM ET)

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Every CVE for nimiq core-rs-albatross

Exploited in the last 30 days

nimiq/core-rs-albatross is a Rust implementation of the Nimiq Proof-of-Stake protocol based on the Albatross consensus algorithm. In versions 1.2.2 and below, an unauthenticated p2p peer can cause the RequestMacroChain message handler task to panic. Sending a RequestMacroChain message where the first locator hash on the victim’s main chain is a micro block hash (not a macro block hash) causes said panic. The RequestMacroChain::handle handler selects the locator based only on "is on main chain", then calls get_macro_blocks() and panics via .unwrap() when the selected hash is not a macro block (BlockchainError::BlockIsNotMacro). This issue has been fixed in version 1.3.0.

CVSS: 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weakness (CWE): CWE-617
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Apr 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

nimiq core-rs-albatross nimiq:core_rs_albatross (from the name)	before 1.3.0	CNA record
nimiq nimiq_proof-of-stake nimiq:nimiq_proof-of-stake	before 1.3.0	NVD

References

References

https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-48m6-486p-9j8p	x-refsource-confirm, patch, vendor-advisory
https://github.com/nimiq/core-rs-albatross/pull/3660	x-refsource-misc, issue-tracking, patch
https://github.com/nimiq/core-rs-albatross/commit/ae6c1e92342e72f80fd12accbe66ee80dd6802ac	x-refsource-misc, patch
https://github.com/nimiq/core-rs-albatross/releases/tag/v1.3.0	x-refsource-misc, release-notes

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.