libp2p: Memory DoS via subscription flood of unique topics
Priority HIGH 72CWE-20Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-400.
Summary
libp2p is a JavaScript Implementation of libp2p networking stack. Prior to version 15.0.23, three cooperating omissions in @libp2p/gossipsub allow an unauthenticated single peer to exhaust the Node.js heap of any gossipsub node with default options. This issue has been patched in version 15.0.23.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00278 20th percentileScored 2026-11-07
Fix Fixed js-libp2p (libp2p): 15.0.23@libp2p/gossipsub (npm): 15.0.23
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
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 |
|---|---|---|---|---|---|
| libp2p | js-libp2p | before 15.0.23 | 15.0.23 | Patch available | CNA |
| — | @libp2p/gossipsub (npm) | before 15.0.23 | 15.0.23 | Patch available | GHSA-4f8r-922h-2vgv |
- js-libp2p Vendorlibp2p Affected before 15.0.23 Fixed in 15.0.23 Patch available CNA
- @libp2p/gossipsub (npm) Vendor— Affected before 15.0.23 Fixed in 15.0.23 Patch available GHSA-4f8r-922h-2vgv
Remediation
- Fix · CNA js-libp2p (libp2p) Fixed in 15.0.23
- Fix · GHSA-4f8r-922h-2vgv @libp2p/gossipsub (npm) Fixed in 15.0.23 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-46679
- 2026-10-03 Alias added: GHSA-4f8r-922h-2vgv
References
More libp2p vulnerabilities
- TI-2026-60386 libp2p-rendezvous through 0.17.1 Denial of Service via Unbounded Registration TTL in Discovery Responses CVSS 4.0HIGH 8.7
- TI-2026-58865 libp2p: PeerStore accepts attacker-signed PeerRecords for a victim peer ID and stores certified attacker addresses CVSS 3.1HIGH 8.2
- TI-2026-44102 libp2p-quic: Remote panic via certificate expiry race during QUIC handshake CVSS 4.0HIGH 8.2
- TI-2026-27587 libp2p-rust has unbounded rendezvous DISCOVER cookies enable remote memory exhaustion CVSS 3.1HIGH 8.2
- TI-2026-58864 libp2p: Gossipsub StrictSign accepts attacker-signed messages as a victim RSA peer ID CVSS 3.1HIGH 7.5
- TI-2026-53982 libp2p: Circuit relay v2 server reservation refresh leaks abort listeners and allows remote resource exhaustion CVSS 3.1HIGH 7.5
Sources
- CVE-2026-46679 · CVE Program
- CVE-2026-46679 · NVD
- FIRST EPSS
- GHSA-4f8r-922h-2vgv · 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