Blockstream c-lightning through 0.10.1 allows loss of funds because of dust HTLC exposure.
Priority MEDIUM 44CWE-770Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- Low · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-770.
Summary
Blockstream c-lightning through 0.10.1 allows loss of funds because of dust HTLC exposure.
Why it matters now
EPSS 0.01546 75th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:elementsproject:c-lightning:*:*:*:*:*:*:*:* | up to 0.10.1 | Vulnerable | Elementsproject |
- cpe:2.3:a:elementsproject:c-lightning:*:*:*:*:*:*:*:* Versions up to 0.10.1 Vulnerable ·Elementsproject
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-41592
- 2026-10-03 Alias added: GHSA-rqmp-32v6-q5qj
References
Advisory 5
- https://lists.linuxfoundation.org/pipermail/lightning-dev/2020-May/002714.html
- https://bitcoinmagazine.com/technical/good-griefing-a-lingering-vulnerability-on-lightning-network-that-still-needs-fixing
- https://github.com/ElementsProject/lightning
- https://lists.linuxfoundation.org/pipermail/lightning-dev/2021-October/003257.html
- https://lists.linuxfoundation.org/pipermail/lightning-dev/2021-October/003264.html
More Elementsproject C-lightning vulnerabilities
- TI-2019-09737 c-lightning before 0.7.1 allows attackers to trigger loss of funds because of Incorrect… CVSS 3.1HIGH 7.5
Sources
- CVE-2021-41592 · CVE Program
- CVE-2021-41592 · NVD
- FIRST EPSS
- GHSA-rqmp-32v6-q5qj · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences