{"id":"CVE-2026-46369","title":"Nimiq is a Rust implementation of the Nimiq Proof-of-Stake protocol based on the Albatross consensus algorithm","summary":"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 t…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","cwe":["CWE-193","CWE-294"],"vendor":"nimiq-blockchain","product":"nimiq-blockchain","affected":["nimiq-blockchain <= 1.5.0"],"patched":["nimiq-blockchain 1.5.1"],"published":"2026-08-26","updated":"2026-09-09","sourceUpdated":"2026-09-09T21:09:13.080","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-46369","references":[{"url":"https://github.com/nimiq/core-rs-albatross/commit/a530b2434ebca6e3716f07c73079786fcc6f2e41","label":"security-advisories@github.com"},{"url":"https://github.com/nimiq/core-rs-albatross/pull/3772","label":"security-advisories@github.com"},{"url":"https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-3763-qp59-59vf","label":"security-advisories@github.com"},{"url":"https://github.com/advisories/GHSA-3763-qp59-59vf"}],"tags":["nvd","ghsa","rust"],"epss":0.00549,"epssPercentile":0.43686,"aliases":["GHSA-3763-qp59-59vf"],"ecosystem":"rust","ingestedAt":"2026-08-12T15:53:06.013Z","slug":"CVE-2026-46369","body":"## Overview\n\nNimiq 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-46369)\n\nAffected packages:\n\n- `nimiq-blockchain <= 1.5.0`\n\nPatched in:\n\n- `nimiq-blockchain 1.5.1`\n\nSource: https://github.com/advisories/GHSA-3763-qp59-59vf","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}