CVE-2026-46369
High
Description
Nimiq is a Rust implementation of the Nimiq Proof-of-Stake protocol based on the Albatross consensus algorithm. Through 1.5.0, the validity store uses a strict lower-bound comparison that expires a stored transaction too early relative to Transaction::is_valid_at, allowing a remote attacker to replay the same signed transaction during a blocks_per_batch minus one block window and cause the sender and recipient balances to be updated twice. This issue is fixed in version 1.5.1.
SeverityHigh
CVSS7.5
Exploit probability—
ProductNimiq Core-rs-albatross
PublishedAug 26, 2026
First seenAug 26, 2026
Weakness typeCWE-193CWE-193CWE-294CWE-294
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| nimiq core-rs-albatross | < 1.5.1 | — |
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