Vesting Contract Underflow Vulnerability in Nimiq's Rust Implementation
CVE-2026-34064

5.3MEDIUM

Key Information:

Vendor

Nimiq

Status
Nimiq-account
Vendor
CVE Published:
22 April 2026

What is CVE-2026-34064?

Nimiq's Rust implementation contains a vulnerability within the VestingContract that can be exploited to cause a node crash. This occurs when the precondition min_cap exceeds the balance, leading to an underflow during error handling. As attackers can create a vesting contract without proper validation of total_amount, they can orchestrate an outgoing transaction that triggers a panic in the node during mempool admission. It is essential for users to upgrade to version 1.3.0 or later to mitigate this risk, as no workarounds are available.

Affected Version(s)

nimiq-account < 1.3.0

References

https://github.com/nimiq/core-rs-albatross/security/advis...
x_refsource_CONFIRM
https://github.com/nimiq/core-rs-albatross/pull/3658
x_refsource_MISC
https://github.com/nimiq/core-rs-albatross/commit/4d01946...
x_refsource_MISC

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.