Vulnerability in Nimiq Core-Rs-Albatross
CVE-2026-34069
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.003 (22.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 22.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.003 · change: -0.002
Affected products
- Nimiq Core-Rs-Albatross — versions < 1.3.0
- Nimiq Proof-Of-Stake
Weakness classification (CWE)
References
- github.com/nimiq/core-rs-albatross/security/advisories/GHSA-48m6-486p-9j8p (Patch, Vendor Advisory)
- github.com/nimiq/core-rs-albatross/pull/3660 (Patch, Issue Tracking)
- github.com/nimiq/core-rs-albatross/commit/ae6c1e92342e72f80fd12accbe66ee80dd680… (Patch)
- github.com/nimiq/core-rs-albatross/releases/tag/v1.3.0 (Release Notes)
Frequently asked questions
- What is CVE-2026-34069?
- CVE-2026-34069 is a medium-severity vulnerability in Nimiq Core-Rs-Albatross, classified under Reachable Assertion. CVSS score: 5.3/10. Published 2026-04-14.
- How severe is CVE-2026-34069?
- Medium severity. CVSS v3 base score is 5.3 out of 10.