nimiq/core-rs-albatross's nimiq-blockchain missing proposal body root verification

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Summary

CVECVE-2026-28402
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-02-27 22:16:23 UTC
Updated2026-05-04 14:25:55 UTC
Descriptionnimiq/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.

Risk And Classification

Primary CVSS: v3.1 7.1 HIGH from [email protected]

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

EPSS: 0.000080000 probability, percentile 0.007760000 (date 2026-05-05)

Problem Types: CWE-354 | CWE-354 CWE-354: Improper Validation of Integrity Check Value

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.1HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
3.1CNADECLARED7.1HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
High

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Nimiq Nimiq Proof-of-stake All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Nimiq Core-rs-albatross affected < 1.2.2 Not specified

References

ReferenceSourceLinkTags
github.com/nimiq/core-rs-albatross/releases/tag/v1.2.2 [email protected] github.com Release Notes
github.com/nimiq/core-rs-albatross/commit/6454c26d966858c5520f55739a30b9... [email protected] github.com Patch
github.com/nimiq/core-rs-albatross/security/advisories/GHSA-7wh6-rmxx-ww47 [email protected] github.com Third Party Advisory
github.com/nimiq/core-rs-albatross/pull/3623 [email protected] github.com Patch
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