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EUVD-2026-5524

2026-10-07T23:34:37.368695+00:00

EUVD-2026-5524

fkie_cve-2024-34694

2026-10-07T23:34:37.368728+00:00

LNbits is a Lightning wallet and accounts system. Paying invoices in Eclair that do not get settled within the internal timeout (about 30s) lead to a payment being considered failed, even though it may still be in flight. This vulnerability can lead to a total loss of funds for the node backend. This vulnerability is fixed in 0.12.6.

GHSA-3j4h-h3fp-vwww — LNbits improperly handles potential network and payment failures when using Eclair backend

2026-10-07T23:34:37.368760+00:00

Affected: PyPI: lnbits

### Summary

Paying invoices in Eclair that do not get settled within the internal timeout (about 30s) lead to a payment being considered failed, even though it may still be in flight.

### Details

Using `blocking: true` on the API call will lead to a timeout error if a payment does not get settled in the 30s timeout with the error: `Ask timed out on [Actor[akka://eclair-node/user/$l#134241942]] after [30000 ms]. Message of type [fr.acinq.eclair.payment.send.PaymentInitiator$SendPaymentToNode]. A typical reason for AskTimeoutException is that the recipient actor didn't send a reply.` https://github.com/lnbits/lnbits/blob/c04c13b2f8cfbb625571a07dfddeb65ea6df8dac/lnbits/wallets/eclair.py#L138

This is considered a payment failure by parts of the code, and assumes the payment is not going to be settled after: https://github.com/lnbits/lnbits/blob/c04c13b2f8cfbb625571a07dfddeb65ea6df8dac/lnbits/wallets/eclair.py#L144 https://github.com/lnbits/lnbits/blob/c04c13b2f8cfbb625571a07dfddeb65ea6df8dac/lnbits/wallets/eclair.py#L141 https://github.com/lnbits/lnbits/blob/c04c13b2f8cfbb625571a07dfddeb65ea6df8dac/lnbits/wallets/eclair.py#L146

The best way to fix this is to check the payment status after an error, and when not sure, always consider a payment still in flight.

### PoC

A very simple way to exploit this is: - Create a hold invoice - Pay the invoice with the LNbits server backed by an Eclair node, until it times out - Settle the hold invoice

### Impact

This vulnerability ca…

PYSEC-2026-1580 — LNbits improperly handles potential network and payment failures when using Eclair backend

2026-10-07T23:34:37.368806+00:00