CVE-2020-26895

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.

Published: 2020-10-21 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-26895 is rated Low Risk (28.4/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.06%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2020-26895

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2023-03-07 0.95% 0.06% -0.90%
2 2022-04-01 5.74% 0.95% -4.78%
3 2022-02-04 — 5.74% —

Full EPSS history (5 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-26895

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 1.4 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2020-26895

Affected software / configurations for CVE-2020-26895

Vendor Product Version Raw CPE
lightning_network_daemon_project lightning_network_daemon 0.1 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.1:alpha:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.1.1 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.1.1:alpha:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.2 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.2:alpha:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.2.1 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.2.1:alpha:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.3 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.3:alpha:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.4 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.4:beta:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.4.1 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.4.1:beta:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.4.2 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.4.2:beta:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.5 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.5:beta:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.5 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.5:beta_rc1:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.5 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.5:beta_rc2:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.5.1 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.5.1:beta:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.5.1 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.5.1:beta_rc1:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.5.1 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.5.1:beta_rc2:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.5.1 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.5.1:beta_rc3:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.5.1 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.5.1:beta_rc4:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.5.2 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.5.2:beta:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.6 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.6:beta:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.6 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.6:beta_rc1:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.6 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.6:beta_rc2:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.6 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.6:beta_rc3:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.6 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.6:beta_rc4:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.6.1 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.6.1:beta:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.6.1 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.6.1:beta_rc1:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.6.1 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.6.1:beta_rc2:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.7.0 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.7.0:beta:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.7.0 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.7.0:beta_rc1:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.7.0 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.7.0:beta_rc2:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.7.0 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.7.0:beta_rc3:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.7.1 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.7.1:beta:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.7.1 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.7.1:beta_rc1:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.7.1 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.7.1:beta_rc2:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.8.0 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.8.0:beta:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.8.0 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.8.0:beta_rc1:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.8.0 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.8.0:beta_rc2:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.8.0 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.8.0:beta_rc3:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.8.1 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.8.1:beta:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.8.2 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.8.2:beta:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.8.2 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.8.2:beta_rc1:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.8.2 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.8.2:beta_rc2:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.9.0 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.9.0:beta:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.9.0 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.9.0:beta_rc1:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.9.0 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.9.0:beta_rc2:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.9.0 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.9.0:beta_rc3:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.9.0 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.9.0:beta_rc4:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.9.1 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.9.1:beta:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.9.1 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.9.1:beta_rc1:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.9.2 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.9.2:beta:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.10.0 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.10.0:beta_rc1:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.10.0 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.10.0:beta_rc2:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.10.0 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.10.0:beta_rc3:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.10.0 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.10.0:beta_rc4:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.10.0 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.10.0:beta_rc5:*:*:*:*:*:*
lightning_network_daemon_project lightning_network_daemon 0.10.0 cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.10.0:beta_rc6:*:*:*:*:*:*

References for CVE-2020-26895

cvelogic Threat Intelligence