CVE-2026-119757

Critical

Description

BTCPay Server before 2.4.2, including 2.4.2 release candidates, contains an information disclosure vulnerability that allows unauthenticated remote attackers to retrieve .macaroon credential files for an LND (Lightning Network Daemon) node. Attackers can use the exposed macaroon to gain full control of the LND node, including moving funds, resulting in theft of funds from affected deployments.

SeverityCritical

CVSS9.8

Exploit probability—

ProductBTCPay Server

PublishedNov 5, 2026

First seenNov 5, 2026

Weakness typeCWE-522CWE-522 CWE-552CWE-552

How to fix

Update

BTCPay Server BTCPay Server2.4.2 or later

Patches

blog.btcpayserver.org/security-advisory-btcpay-server-2-4-2/

Affected products

Product	Affected versions	Fixed in
BTCPay Server BTCPay Server	v < 2.4.2	2.4.2

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