Gossipsub 1.0 does not properly resist invalid message spam, such as an eclipse attack or a sybil attack.
Priority MEDIUM 46Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
Gossipsub 1.0 does not properly resist invalid message spam, such as an eclipse attack or a sybil attack.
Why it matters now
EPSS 0.01937 80th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
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
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-12821
- 2026-10-03 Alias added: GHSA-3fxj-w9rj-xjw3
References
More Protocol Gossipsub vulnerabilities
- TI-2022-23607 GossipSub 1.1, as used for Ethereum 2.0, allows a peer to maintain a positive score (and… CVSS 3.1MEDIUM 5.3
Sources
- CVE-2020-12821 · CVE Program
- CVE-2020-12821 · NVD
- FIRST EPSS
- GHSA-3fxj-w9rj-xjw3 · 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