Description
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.
Affected products
nimiq: nimiq proof-of-stake
References4
- github.com/nimiq/core-rs-albatross/security/advisories/GHSA-48m… PatchVendor Advisory
- github.com/nimiq/core-rs-albatross/commit/ae6c1e92342e72f80fd12… Patch
- github.com/nimiq/core-rs-albatross/pull/3660 Issue TrackingPatch
- github.com/nimiq/core-rs-albatross/releases/tag/v1.3.0 Release Notes
Metrics
- CVSS 3.1
-
5.3
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L - EPSS — exploit probability
- 0% percentile: 24 · as of 12 November 2026
- CWE
- CWE-617
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.