nimiq/core-rs-albatross · Security
nimiq-blockchain is missing a wall-clock upper bound on block timestamps
- GHSA ID
- GHSA-49xc-52mp-cc9j
- CVE ID
- CVE-2026-40093
- Severity
- critical
- Published
- Updated
- CVSS
- 9.1 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
- CVSS v3
- 9.1 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Description
Impact
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.
Patches
TBD
Workarounds
No know workarounds.
CWEs
- CWE-20 · Improper Input Validation
- CWE-1284 · Improper Validation of Specified Quantity in Input