Server-Side Request Forgery via LNURL Authentication Callback in LNbits Lightning Network Payment System
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub.
Summary
LNbits is a Lightning wallet and accounts system. A Server-Side Request Forgery (SSRF) vulnerability has been discovered in LNbits' LNURL authentication handling functionality. When processing LNURL authentication requests, the application accepts a callback URL parameter and makes an HTTP request to that URL using the httpx library with redirect following enabled. The application doesn't properly validate the callback URL, allowing attackers to specify internal network addresses and access internal resources.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| lnbits | lnbits | up to 0.12.12 | — | No fix listed | CNA |
| — | lnbits (PyPI) | up to 0.12.12 | — | No fix listed | GHSA-qp8j-p87f-c8cc |
- lnbits Vendorlnbits Affected up to 0.12.12 Fixed in — No fix listed CNA
- lnbits (PyPI) Vendor— Affected up to 0.12.12 Fixed in — No fix listed GHSA-qp8j-p87f-c8cc
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2025-32013
- 2026-10-03 Alias added: GHSA-qp8j-p87f-c8cc
- 2026-10-18 EPSS moved to the 50th–90th percentile
References
Sources
- CVE-2025-32013 · CVE Program
- CVE-2025-32013 · NVD
- FIRST EPSS
- GHSA-qp8j-p87f-c8cc · GitHub Advisory Database · CC BY 4.0
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