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

Status: published. Published: 2026-11-05. Updated: 2026-11-05.

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.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulnCheck) — https://blog.btcpayserver.org/security-advisory-btcpay-server-2-4-2/

## Affected products and versions

- BTCPay Server / BTCPay Server (btcpayserver/btcpayserver): ≥ 0; < 2.4.2 (affected, semver). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 4.0: 9.3 (critical); CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N; source: CNA: VulnCheck

- CVSS 3.1: 9.8 (critical); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H; source: CNA: VulnCheck

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-552, CWE-522

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://blog.btcpayserver.org/security-advisory-btcpay-server-2-4-2/ (CNA: VulnCheck; vendor-advisory, patch)

- https://www.binance.com/en/square/post/384812445203404 (CNA: VulnCheck; technical-description)

- https://www.vulncheck.com/advisories/btcpay-server-lnd-macaroon-credential-file-disclosure (CNA: VulnCheck; third-party-advisory)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-119757; retrieved 2026-11-05; source updated 2026-11-05

Revision: 763cc8d2f740c332ca3171e70e9e0db9ae21aeea03f52be66f58fb891f4edb27

Canonical: https://y2.dev/cve/CVE-2026-119757

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