How severe is CVE-2020-26895?

CVE-2020-26895 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2020-26895 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-26895?

CVE-2020-26895 primarily affects Lightning Network Daemon Project Lightning Network Daemon. In total, 54 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-26895?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-26895 published?

CVE-2020-26895 was published on 2020-10-21 and last updated on 2026-06-17.

CVE-2020-26895

CVE-2020-26895 is a medium-severity vulnerability in Lightning Network Daemon Project Lightning Network Daemon with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-354.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-354
Affected product: Lightning Network Daemon Project Lightning Network Daemon
Published: 2020-10-21
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2020-26895?: CVE-2020-26895 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2020-26895 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-26895?: CVE-2020-26895 primarily affects Lightning Network Daemon Project Lightning Network Daemon. In total, 54 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-26895?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-26895 published?: CVE-2020-26895 was published on 2020-10-21 and last updated on 2026-06-17.

References

Affected products (54)

cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.1:alpha:*:*:*:*:*:*
cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.1.1:alpha:*:*:*:*:*:*
cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.2:alpha:*:*:*:*:*:*
cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.2.1:alpha:*:*:*:*:*:*
cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.3:alpha:*:*:*:*:*:*
cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.4:beta:*:*:*:*:*:*
cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.4.1:beta:*:*:*:*:*:*
cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.4.2:beta:*:*:*:*:*:*
cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.5:beta:*:*:*:*:*:*
cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.5:beta_rc1:*:*:*:*:*:*
cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.5:beta_rc2:*:*:*:*:*:*
cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.5.1:beta:*:*:*:*:*:*
cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.5.1:beta_rc1:*:*:*:*:*:*
cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.5.1:beta_rc2:*:*:*:*:*:*
cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.5.1:beta_rc3:*:*:*:*:*:*
cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.5.1:beta_rc4:*:*:*:*:*:*
cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.5.2:beta:*:*:*:*:*:*
cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.6:beta:*:*:*:*:*:*
cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.6:beta_rc1:*:*:*:*:*:*
cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.6:beta_rc2:*:*:*:*:*:*
cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.6:beta_rc3:*:*:*:*:*:*
cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.6:beta_rc4:*:*:*:*:*:*
cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.6.1:beta:*:*:*:*:*:*
cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.6.1:beta_rc1:*:*:*:*:*:*
cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.6.1:beta_rc2:*:*:*:*:*:*
cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.7.0:beta:*:*:*:*:*:*
cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.7.0:beta_rc1:*:*:*:*:*:*
cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.7.0:beta_rc2:*:*:*:*:*:*
cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.7.0:beta_rc3:*:*:*:*:*:*
cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.7.1:beta:*:*:*:*:*:*
cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.7.1:beta_rc1:*:*:*:*:*:*
cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.7.1:beta_rc2:*:*:*:*:*:*
cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.8.0:beta:*:*:*:*:*:*
cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.8.0:beta_rc1:*:*:*:*:*:*
cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.8.0:beta_rc2:*:*:*:*:*:*
cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.8.0:beta_rc3:*:*:*:*:*:*
cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.8.1:beta:*:*:*:*:*:*
cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.8.2:beta:*:*:*:*:*:*
cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.8.2:beta_rc1:*:*:*:*:*:*
cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.8.2:beta_rc2:*:*:*:*:*:*

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