Vulnerability · Published Feb 27, 2026 · Assigned by GitHub_M
CVE-2026-28402nimiq/core-rs-albatross's nimiq-blockchain missing proposal body root verification
High 7.1
In plain English
A high-severity security flaw in core-rs-albatross from nimiq. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 13% of all known vulnerabilities).
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| nimiq | core-rs-albatross | < 1.2.2 |
Weakness: CWE-354 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
References
- https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-7wh6-rmxx-ww47 x_refsource_CONFIRM
- https://github.com/nimiq/core-rs-albatross/pull/3623 x_refsource_MISC
- https://github.com/nimiq/core-rs-albatross/commit/6454c26d966858c5520f55739a30b94c17656c85 x_refsource_MISC
- https://github.com/nimiq/core-rs-albatross/releases/tag/v1.2.2 x_refsource_MISC