CVE-2020-12821
Gossipsub 1.0 does not properly resist invalid message spam, such as an eclipse attack or a sybil...
CVE-2020-12821 is a critical vulnerability (CVSS 9.8) in Protocol Gossipsub, published July 7, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.94%, the 80th percentile. No source names a fixed version.
- Severity
- 9.8 CriticalCVSS 3.1, NVD
- Exploit chance
- 1.94%EPSS, 80th percentile
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
- No fix listedNo source names one
Description
Gossipsub 1.0 does not properly resist invalid message spam, such as an eclipse attack or a sybil attack.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
Affected products
What each source reports
NVD Score used
Gossipsub 1.0 does not properly resist invalid message spam, such as an eclipse attack or a sybil attack.
- Record
CVE-2020-12821- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Updated
- 2026-11-02
CVE ListNo score
Gossipsub 1.0 does not properly resist invalid message spam, such as an eclipse attack or a sybil attack.
- Record
CVE-2020-12821- Updated
- 2026-11-02
EUVDEUVD-2020-5104No score
Gossipsub 1.0 does not properly resist invalid message spam, such as an eclipse attack or a sybil attack.
- Record
EUVD-2020-5104- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-3fxj-w9rj-xjw3No score
Gossipsub 1.0 does not properly resist invalid message spam, such as an eclipse attack or a sybil...
Gossipsub 1.0 does not properly resist invalid message spam, such as an eclipse attack or a sybil attack.
- Record
GHSA-3fxj-w9rj-xjw3- Updated
- 2026-11-02
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
References
github.com/libp2p/specs/tree/master/pubsub/gossipsub
bitcoin.stackexchange.com/questions/61151/eclipse-attack-vs-sybil-attack
gateway.ipfs.io/ipfs/QmPWuNBs8h6a8KamRvGqhTq5UDYJRQsEEy37zDKjujQQQm/Gossipsub%20Evaluation%20Report.pdf
nvd.nist.gov/vuln/detail/CVE-2020-12821