Eclair Lightning Nodes Face Crash Trap: Unfunded database floods risk persistent loops.
Why the Lightning Network’s Zero-Cost Attack Vector Threatens Institutional Bitcoin Routing
Bitcoin’s scaling solution is vulnerable to attacks that cost perpetrators absolutely nothing to execute.
A structural vulnerability in the Eclair Lightning client allows malicious actors to crash nodes repeatedly without committing on-chain capital. Security researcher Erick Cestari disclosed this database flood exploit on Sept. 30, 2026, alongside an Oct. 1, 2026 developer report detailing a second denial-of-service vulnerability identified as LNF-2026-0003 by Matt Morehouse.
The core vulnerability affects Eclair versions v0.14.0 and earlier, allowing attackers to bypass pending channel limits through inconsistent identifier checks. In a controlled test environment, the exploit accumulated 217,623 database rows, exhausting a 4 GB Java Virtual Machine heap in exactly 47 minutes and 43 seconds. Although ACINQ merged PR #3324 on July 17, 2026, and shipped version v0.14.1 on July 29, 2026, the team now urges node operators to upgrade to version v0.14.3, released on Sept.
— — coin24.news Editorial
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