Vulnerability in Nimiq Core-Rs-Albatross
CVE-2026-46369
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.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
Affected products
- Nimiq Core-rs-albatross — versions < 1.5.1
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_CONFIRM)
Frequently asked questions
- What is CVE-2026-46369?
- CVE-2026-46369 is a high-severity vulnerability in Nimiq Core-Rs-Albatross, classified under Off-by-one Error. CVSS score: 7.5/10. Published 2026-08-26.
- How severe is CVE-2026-46369?
- High severity. CVSS v3 base score is 7.5 out of 10.