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CVE-2020-26896

8.2 · HIGH

Prior to 0.11.0-beta, LND (Lightning Network Daemon) had a vulnerability in its invoice database.

Published Oct 21, 2020CWE-354EPSS 0.74%

Overview

CVE-2020-26896 is a high-severity vulnerability. It was published on October 21, 2020 and has a CVSS 3.1 base score of 8.2 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.2, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Prior to 0.11.0-beta, LND (Lightning Network Daemon) had a vulnerability in its invoice database. While claiming on-chain a received HTLC output, it didn't verify that the corresponding outgoing off-chain HTLC was already settled before releasing the preimage. In the case of a hash-and-amount collision with an invoice, the preimage for an expected payment was instead released. A malicious peer could have deliberately intercepted an HTLC intended for the victim node, probed the preimage through a colluding relayed HTLC, and stolen the intercepted HTLC. The impact is a loss of funds in certain situations, and a weakening of the victim's receiver privacy.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgist.github.com/ariard/6bdeb995565d1cc292753e1ee4ae402dReflists.linuxfoundation.org/pipermail/lightning-dev/2020-October/002855.htmlReflists.linuxfoundation.org/pipermail/lightning-dev/2020-October/002857.htmlGitHubgist.github.com/ariard/6bdeb995565d1cc292753e1ee4ae402dReflists.linuxfoundation.org/pipermail/lightning-dev/2020-October/002855.htmlReflists.linuxfoundation.org/pipermail/lightning-dev/2020-October/002857.html

How CyberStrike helps

Frequently asked questions

What is CVE-2020-26896?

CVE-2020-26896 is a high-severity vulnerability. It was published on October 21, 2020 and has a CVSS 3.1 base score of 8.2 (HIGH).

How severe is CVE-2020-26896?

This vulnerability has a CVSS 3.1 base score of 8.2, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2020-26896?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2020-26896?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2020-26896 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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