Medium
Security advisory
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2020-26895
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 04:32 UTC · Revision 1
Source evidence
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.
osv:CVE-2020-26895
Complete source record
{
"id": "64f5c3765e7d2e213bc20e7a51bb3ca30954875efbd2f9e49f5512c2a22668f2",
"url": "https://osv.dev/vulnerability/CVE-2020-26895",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2020-26895",
"summary": "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.",
"evidence": "osv:CVE-2020-26895",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2020-26895",
"aliases": [
"CVE-2020-26895"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/lightningnetwork/lnd",
"type": "GIT",
"events": [
{
"introduced": "4ccdad0d663f794181a368e5f006f34b28cf4df0"
},
{
"last_affected": "1d548684e2b2bbbbf342ac3dd7076371550301ff"
}
],
"database_specific": {
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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"source": "CPE_STRING"
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{
"cpe": "cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.5:beta_rc1:*:*:*:*:*:*",
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{
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{
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{
"cpe": "cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.5.1:beta:*:*:*:*:*:*",
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{
"cpe": "cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.5.1:beta_rc1:*:*:*:*:*:*",
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{
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{
"cpe": "cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.5.1:beta_rc3:*:*:*:*:*:*",
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{
"cpe": "cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.5.1:beta_rc4:*:*:*:*:*:*",
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
"cpe": "cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.10.0:beta_rc4:*:*:*:*:*:*",
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},
{
"cpe": "cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.10.0:beta_rc5:*:*:*:*:*:*",
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{
"introduced": "0.10.0-beta_rc5"
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{
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}
],
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},
{
"cpe": "cpe:2.3:a:lightning_network_daemon_project:lightning_network_daemon:0.10.0:beta_rc6:*:*:*:*:*:*",
"range": [
{
"introduced": "0.10.0-beta_rc6"
},
{
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}
],
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}
]
}
}
],
"versions": [
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"0.10.0-beta_rc2",
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"queue/v1.0.3",
"cert/v1.0.1",
"v0.9.0-beta",
"v0.9.0-beta-rc4",
"v0.9.0-beta-rc3",
"v0.9.0-beta-rc2",
"v0.9.0-beta-rc1",
"queue/v1.0.2",
"v0.8.0-beta",
"v0.8.0-beta-rc3",
"v0.8.0-beta-rc2",
"v0.8.0-beta-rc1",
"v0.7.1-beta-rc2",
"v0.7.1-beta",
"v0.7.1-beta-rc1",
"v0.7.0-beta",
"v0.7.0-beta-rc2",
"v0.7.0-beta-rc3",
"v0.7.0-beta-rc1",
"v0.6.1-beta",
"v0.6.1-beta-rc2",
"v0.6.1-beta-rc1",
"v0.6.0-beta",
"v0.6-beta",
"v0.5.1-beta",
"v0.6-beta-rc4",
"v0.6-beta-rc3",
"v0.6-beta-rc2",
"v0.6-beta-rc1",
"upstream",
"queue/v1.0.1",
"v0.5.1-beta-rc4",
"v0.5.1-beta-rc3",
"v0.5.1-beta-rc2",
"v0.5.1-beta-rc1",
"v0.5-beta",
"v0.5-beta-rc2",
"v0.5-beta-rc1",
"v0.4.2-beta",
"v0.4.1-beta",
"v0.4-beta",
"v0.3-alpha",
"v0.2.1-alpha",
"v0.2-alpha",
"v0.1.1-alpha",
"v0.1-alpha"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-26895.json"
}
}
],
"modified": "2026-10-24T10:30:19.876256065Z",
"provider": "osv",
"references": [
"https://gist.github.com/ariard/fb432a9d2cd3ba24fdc18ccc8c5c6eb4",
"https://lists.linuxfoundation.org/pipermail/lightning-dev/2020-October/002856.html",
"https://lists.linuxfoundation.org/pipermail/lightning-dev/2020-October/002858.html"
],
"provider_metadata": {}
},
"related_cves": [
{
"value": "CVE-2020-26895",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 430123,
"published_at": "2020-10-21T02:15:12.66+00:00"
}