CVE
CVE-2026-40093
nimiq-blockchain is missing a wall-clock upper bound on block timestamps
Impact
Block timestamp validation enforces that timestamp >= parent.timestamp for non-skip blocks and timestamp == parent.timestamp + MINPRODUCERTIMEOUT 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.
Package Versions Affected
Package Version
patch Availability
No items found.
Automatically patch vulnerabilities without upgrading
Fix Without Upgrading
Detect compatible fix
Apply safe remediation
Fix with a single pull request
CVSS Version
Severity
Base Score
CVSS Version
Score Vector
C
H
U
8.1
-
3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
C
H
U
-
Related Resources
No items found.
References
https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-49xc-52mp-cc9j, https://nvd.nist.gov/vuln/detail/CVE-2026-40093, https://github.com/nimiq/core-rs-albatross
Basic Information
Ecosystem
