CVE-2020-26895

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.

Category

5.3
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.15%
Third-Party Advisory github.com Third-Party Advisory linuxfoundation.org Third-Party Advisory linuxfoundation.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://gist.github.com/ariard/fb432a9d2cd3ba24fdc18ccc8c5c6eb4 third party advisory
https://lists.linuxfoundation.org/pipermail/lightning-dev/2020-October/002856.html third party advisory mailing list
https://lists.linuxfoundation.org/pipermail/lightning-dev/2020-October/002858.html third party advisory mailing list

Frequently Asked Questions

What is the severity of CVE-2020-26895?
CVE-2020-26895 has been scored as a medium severity vulnerability.
How to fix CVE-2020-26895?
To fix CVE-2020-26895, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-26895 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2020-26895 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.