CVE-2021-41591: Acinq Eclair

Critical severity, CVSS 9.4. EPSS: 1.7% chance of exploitation in the next 30 days.

ACINQ Eclair before 0.6.3 allows loss of funds because of dust HTLC exposure.

Affected products

• Acinq Eclair: before 0.6.3 (fixed in 0.6.3)

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