CVE-2019-12999Network attack vector

Fund loss via underfunded channel acceptance

Published Jan 31, 2020 · Updated Aug 4, 2024

Improper channel validation in Lightning Labs lnd 0.7.0 and earlier allows remote attackers to cause loss of funds via invalid channels. After an inbound channel confirms, lnd fails to verify that the funding output value matches the negotiated channel amount, so it accepts an underfunded channel as valid. An attacker must operate a modified peer and route payments through that channel; the victim cannot close the invalid channel to recover the credited incoming value.

CVSS severity7.5
High
EPSS probability2.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper channel validation in Lightning Labs lnd 0.7.0 and earlier allows remote attackers to cause loss of funds via invalid channels. After an inbound channel confirms, lnd fails to verify that the funding output value matches the negotiated channel amount, so it accepts an underfunded channel as valid. An attacker must operate a modified peer and route payments through that channel; the victim cannot close the invalid channel to recover the credited incoming value.

The record

CVE
CVE-2019-12999
Published
Jan 31, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1657
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 31, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:P/A:N
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1657Financial Theft

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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