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CVE-2026-40093— nimiq-blockchain is missing a wall-clock upper bound on block timestamps

Quick assessment

Affected
nimiq core-rs-albatross
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

core-rs-albatross是Nimiq开源的一个Albatross协议的Rust实现。 core-rs-albatross 1.3.0及之前版本存在安全漏洞，该漏洞源于区块时间戳缺少上限检查，可能导致恶意验证者设置任意未来的时间戳，从而影响奖励计算。

CVSS 8.1 · High EPSS 0.43% · P36

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking
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I. Basic Information for CVE-2026-40093

Vulnerability Information
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Vulnerability Title
nimiq-blockchain is missing a wall-clock upper bound on block timestamps
Source: CVE Program / CVE List V5
Vulnerability Description
nimiq-blockchain provides persistent block storage for Nimiq's Rust implementation. In 1.3.0 and earlier, block timestamp validation enforces that timestamp >= parent.timestamp for non-skip blocks and timestamp == parent.timestamp + MIN_PRODUCER_TIMEOUT for skip blocks, but there is no visible upper bound check against the wall clock. A malicious block-producing validator can set block timestamps arbitrarily far in the future. This directly affects reward calculations via Policy::supply_at() and batch_delay() in blockchain/src/reward.rs, inflating the monetary supply beyond the intended emission schedule.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1284
Source: CVE Program / CVE List V5
Vulnerability Title
core-rs-albatross 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
core-rs-albatross是Nimiq开源的一个Albatross协议的Rust实现。 core-rs-albatross 1.3.0及之前版本存在安全漏洞，该漏洞源于区块时间戳缺少上限检查，可能导致恶意验证者设置任意未来的时间戳，从而影响奖励计算。
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 <= 1.3.0 -

II. Public POCs for CVE-2026-40093

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III. Intelligence Information for CVE-2026-40093

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IV. Related Vulnerabilities

Same product: core-rs-albatross
Same vendor: nimiq
Same weakness: CWE-1284

V. Comments for CVE-2026-40093

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