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Core Lightning v25.12.1 patches a critical signing bug that left on-chain funds unspendable for nodes created with v25.12. Multiple crash fixes included. Upgrade recommended for all v25.12 users and anyone deploying new nodes.
Blockstream fixes signature verification bug that left bitcoin stuck in new Core Lightning nodes, plus payment crashes that shut down entire nodes
Core Lightning's attempt to modernize with 12-word mnemonics hit a critical bug that locked users out of their funds. The team fixed it in three days. Here's what happened and why it matters.
Both major Lightning Network implementations released important bug fix versions in February 2026. LND v0.20.1-beta addresses upgrade compatibility issues and LSP probing, while Core Lightning v25.12.1 fixes critical signing bugs affecting newer nodes.