CVE-2021-41592: Elementsproject C-Lightning

Critical severity, CVSS 9.4. EPSS: 1.5% chance of exploitation in the next 30 days.

Blockstream c-lightning through 0.10.1 allows loss of funds because of dust HTLC exposure.

Affected products

• Elementsproject C-Lightning: up to and including 0.10.1

Published 2021-10-04. Last modified 2026-06-17.