CVE-2026-28402
HIGHCVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
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Description
nimiq/core-rs-albatross is a Rust implementation of the Nimiq Proof-of-Stake protocol based on the Albatross consensus algorithm. Prior to version 1.2.2, a malicious or compromised validator that is elected as proposer can publish a macro block proposal where `header.body_root` does not match the actual macro body hash. The proposal can pass proposal verification because the macro proposal verification path validates the header but does not validate the binding `body_root == hash(body)`; later code expects this binding and may panic on mismatch, crashing validators. Note that the impact is only for validator nodes. The patch for this vulnerability is formally released as part of v1.2.2. The patch adds the corresponding body root verification in the proposal checks. No known workarounds are available.
Analysis
Authenticated validators in nimiq/core-rs-albatross prior to version 1.2.2 can crash validator nodes by submitting macro block proposals with mismatched body roots that pass verification but cause panics during processing. This vulnerability affects only validator nodes and requires the attacker to be an elected proposer with valid credentials. …
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Remediation
Within 24 hours: Immediately audit all Nimiq validator instances to identify those running versions below 1.2.2 and assess exposure level. Within 7 days: Isolate or suspend any at-risk validators from proposal participation if feasible within your infrastructure; escalate to Nimiq development team for patch timeline confirmation. …
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