# @libp2p/gossipsub (npm) vulnerabilities

3 known vulnerabilities (3 high), with the versions each affects and the releases that fix them.

## At a glance

- Latest release: 17.2.1 (Oct 19, 2026): no advisory affects it
- Newest unaffected release: 17.2.1 (Oct 19, 2026), the latest release
- Weekly downloads: 15.3K
- Dependents: 13
- Releases: 215 since 14.1.1 (Sep 20, 2025)
- Registry: https://www.npmjs.com/package/@libp2p/gossipsub
- Releases read: Nov 8, 2026

## Version timeline

Affected versions per advisory, in version order:

- CVE-2026-86038: 15.0.0 to 16.0.5-e86b39e5d (16.0.5 is outside it)
- CVE-2026-49866: 14.1.1-6059227cb to 16.0.0-b7c6dc0f2 (16.0.0 is outside it)
- CVE-2026-46679: 14.1.1-6059227cb to 15.0.23-ed1ad1f26 (15.0.23 is outside it)

## Advisories (3)

### [CVE-2026-86038](https://cve.now/CVE-2026-86038): libp2p: Gossipsub StrictSign accepts attacker-signed messages as a victim RSA peer ID

- Severity: High 7.5
- Published: Sep 17, 2026
- Affected: from 15.0.0, fixed in 16.0.5.
- Fixed in 16.0.5 (released Jul 19, 2026, 60 days before disclosure).
- The latest release, 17.2.1, is not affected.
- 46% of @libp2p/gossipsub downloads last week were affected versions (7.8K).

### [CVE-2026-49866](https://cve.now/CVE-2026-49866): libp2p: CPU DoS via oversized IHAVE and IWANT control message arrays

- Severity: High 7.5
- Published: Jul 8, 2026
- Affected: fixed in 16.0.0.
- Fixed in 16.0.0 (released May 27, 2026, 42 days before disclosure).
- The latest release, 17.2.1, is not affected.
- 26% of @libp2p/gossipsub downloads last week were affected versions (4.5K).

### [CVE-2026-46679](https://cve.now/CVE-2026-46679): libp2p: Memory DoS via subscription flood of unique topics

- Severity: High 7.5
- Published: Jun 10, 2026
- Affected: fixed in 15.0.23.
- Fixed in 15.0.23 (released May 16, 2026, 25 days before disclosure).
- The latest release, 17.2.1, is not affected.
- 8.3% of @libp2p/gossipsub downloads last week were affected versions (1.4K).

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