CVE-2026-34069

MEDIUM 5.3

nimiq-consensus panics via RequestMacroChain micro-block locator

CVSS Score

5.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-617
Vendor	nimiq
Product	core-rs-albatross
Published	Apr 13, 2026
Last Updated	Apr 14, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Affected Versions

nimiq / core-rs-albatross

< 1.3.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-48m6-486p-9j8p github.com: https://github.com/nimiq/core-rs-albatross/pull/3660 github.com: https://github.com/nimiq/core-rs-albatross/commit/ae6c1e92342e72f80fd12accbe66ee80dd6802ac github.com: https://github.com/nimiq/core-rs-albatross/releases/tag/v1.3.0