PT-2026-30251 · Nimiq · Core-Rs-Albatross

Published 2026-04-03 · Updated 2026-04-03 · CVE-2026-33184

NVD

CVSS v3.1

7.5

High

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

nimiq/core-rs-albatross is a Rust implementation of the Nimiq Proof-of-Stake protocol based on the Albatross consensus algorithm. Prior to version 1.3.0, the discovery handler accepts a peer-controlled limit during handshake and stores it unchanged. The immediate HandshakeAck path then honors limit = 0 and returns zero contacts, which makes the session look benign. Later, after the same session reaches Established, the periodic update path computes self.peer list limit.unwrap() as usize - 1. With limit = 0, that wraps to usize::MAX and then in rand 0.9.2, choose multiple() immediately attempts Vec::with capacity(amount), which deterministically panics with capacity overflow. This issue has been patched in version 1.3.0.

Fix

Integer Underflow

Weakness Enumeration

CWE-191

Related Identifiers

CVE-2026-33184

Affected Products

Core-Rs-Albatross

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-33184 · Security Note
• https://github.com/nimiq/core-rs-albatross/pull/3664 · Note
• https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-5rm9-893q-vmhm · Note
• https://github.com/nimiq/core-rs-albatross/releases/tag/v1.3.0 · Note
• https://github.com/nimiq/core-rs-albatross/commit/8f60a2d75b74b55764ecf34bd4435f4961630595 · Note