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CVE-2020-26895

MEDIUM
5.3
CVSS Score
Published: October 21, 2020 at 02:00 AM UTC
Updated: June 17, 2026 at 03:08 AM UTC
1 product affected across 1 vendorLightning Network Daemon

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.7%

Description

Prior to 0.10.0-beta, LND (Lightning Network Daemon) would have accepted a counterparty high-S signature and broadcast tx-relay invalid local commitment/HTLC transactions. This can be exploited by any peer with an open channel regardless of the victim situation (e.g., routing node, payment-receiver, or payment-sender). The impact is a loss of funds in certain situations.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (3)

x_refsource_MISCThird Party Advisory
Source: [email protected]
https://gist.github.com/ariard/fb432a9d2cd3ba24fdc18ccc8c5c6eb4
x_refsource_MISCMailing ListThird Party Advisory
Source: [email protected]
https://lists.linuxfoundation.org/pipermail/lightning-dev/2020-October/002856.html
x_refsource_MISCMailing ListThird Party Advisory
Source: [email protected]
https://lists.linuxfoundation.org/pipermail/lightning-dev/2020-October/002858.html

CVSS

5.3MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-354

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