# Libp2p Gossipsub vulnerabilities

Source: https://junglewise.ai/threats/technologies/gossipsub  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/gossipsub.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 3 vulnerabilities in Libp2p Gossipsub: 0 in the last 7 days and 1 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-86038, was published on 17 September 2026. Nothing in the last four weeks, down from 1 vulnerability in the four before.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 1
- All time: 3 (0 critical, 0 exploited in the wild)

## About Libp2p Gossipsub

Pub/sub gossip protocol implementation for peer-to-peer message broadcasting in libp2p.

## Latest Libp2p Gossipsub vulnerabilities

- [CVE-2026-86038: libp2p Gossipsub message authentication bypass in RSA peer IDs](https://junglewise.ai/threats/cve-2026-86038-libp2p-gossipsub-message-authentication-bypass-in-rsa-peer-ids) (high, CVSS 7.5, published 17 Sep 2026)
- [CVE-2026-49866: libp2p gossipsub denial of service via oversized control messages](https://junglewise.ai/threats/cve-2026-49866-libp2p-gossipsub-denial-of-service-via-oversized-control-messages) (high, CVSS 7.5, published 8 Jul 2026)
- [CVE-2026-46679: libp2p js-libp2p memory exhaustion in @libp2p/gossipsub](https://junglewise.ai/threats/cve-2026-46679-libp2p-js-libp2p-memory-exhaustion-in-libp2p-gossipsub) (high, CVSS 7.5, published 10 Jun 2026)

## Most severe Libp2p Gossipsub vulnerabilities

- [CVE-2026-49866: libp2p gossipsub denial of service via oversized control messages](https://junglewise.ai/threats/cve-2026-49866-libp2p-gossipsub-denial-of-service-via-oversized-control-messages) (high, CVSS 7.5, published 8 Jul 2026)
- [CVE-2026-46679: libp2p js-libp2p memory exhaustion in @libp2p/gossipsub](https://junglewise.ai/threats/cve-2026-46679-libp2p-js-libp2p-memory-exhaustion-in-libp2p-gossipsub) (high, CVSS 7.5, published 10 Jun 2026)
- [CVE-2026-86038: libp2p Gossipsub message authentication bypass in RSA peer IDs](https://junglewise.ai/threats/cve-2026-86038-libp2p-gossipsub-message-authentication-bypass-in-rsa-peer-ids) (high, CVSS 7.5, published 17 Sep 2026)

## Vulnerabilities per week

Nothing in the last four weeks, down from 1 vulnerability in the four before.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 1 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Libp2p Gossipsub vulnerabilities", https://junglewise.ai/threats/technologies/gossipsub, 9 November 2026.