Vulnerability · Published Nov 5, 2026 · Assigned by VulnCheck

CVE-2026-119757BTCPay Server < 2.4.2 LND Macaroon Credential File Disclosure

Critical 9.8

In plain English

A critical-severity security flaw in BTCPay Server from BTCPay Server. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 45% of all known vulnerabilities).

Severity (CVSS 3.1)9.8Critical

Exploit odds (30 days)0.5%top 54.6% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
BTCPay Server	BTCPay Server	0 – before 2.4.2

Weakness: CWE-552, CWE-522 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Vendor Advisory vendor-advisory, patch
Exploitation Announcement technical-description
VulnCheck Advisory: BTCPay Server < 2.4.2 LND Macaroon Credential File Disclosure third-party-advisory