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CVE-2026-46369— Nimiq: Validity store off by one error

Quick assessment

Affected
nimiq core-rs-albatross
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Nimiq Proof-of-Stake是Nimiq组织的一款区块链共识算法软件。 Nimiq Proof-of-Stake 1.5.0及之前版本存在安全漏洞，该漏洞源于有效性存储使用严格下界比较导致存储的交易相对于Transaction::is_valid_at过早过期，可能允许远程攻击者重放同一签名交易，导致发送方和接收方余额被更新两次。

CVSS 7.5 · High EPSS 0.55% · P44

Affected Version Matrix 1

VendorProduct Version RangeStatus
nimiq core-rs-albatross < 1.5.1 affected
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I. Basic Information for CVE-2026-46369

Vulnerability Information
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Vulnerability Title
Nimiq: Validity store off by one error
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
Off-by-one错误
Source: CVE Program / CVE List V5
Vulnerability Title
Nimiq Proof-of-Stake 数字错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Nimiq Proof-of-Stake是Nimiq组织的一款区块链共识算法软件。 Nimiq Proof-of-Stake 1.5.0及之前版本存在安全漏洞，该漏洞源于有效性存储使用严格下界比较导致存储的交易相对于Transaction::is_valid_at过早过期，可能允许远程攻击者重放同一签名交易，导致发送方和接收方余额被更新两次。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
nimiq core-rs-albatross < 1.5.1 -

II. Public POCs for CVE-2026-46369

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 8232 chars
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In-depth vulnerability mechanism
Trigger conditions & impact
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POC zip download
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III. Intelligence Information for CVE-2026-46369

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Patches & Fixes for CVE-2026-46369 (2)

Vendor Advisories for CVE-2026-46369 (1)

IV. Related Vulnerabilities

Same product: core-rs-albatross
Same vendor: nimiq
Same weakness: CWE-193

V. Comments for CVE-2026-46369

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