CVE-2026-103936

libp2p is a JavaScript implementation of the libp2p networking stack. Prior to 6.0.28, the @libp2p/webrtc webRTCDirect() Node.js listener processes unauthenticated STUN Binding Requests before PeerId authentication, Noise, muxing, protocol negotiation, connection creation, or connection-manager admission. The listener in packages/transport-webrtc/src/private-to-public/utils/stun-listener.ts forwards the packet-controlled request.ufrag into DirectRTCPeerConnection.setLocalDescription, where the value is reused as an ICE password without validating its required length and character set. A short credential causes node-datachannel or libdatachannel to raise an uncaught native invalid_argument and abort the process with SIGABRT, allowing a single remote UDP packet to deny service. The confirmed impact is process termination only, with no demonstrated memory corruption, code execution, browser impact, confidentiality impact, integrity impact, or connection-limit bypass. This issue is fixed in version 6.0.28.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/libp2p/js-libp2p/commit/68794c8e2e67d5f38da59e379dc051b2789e46f6
https://github.com/libp2p/js-libp2p/pull/3584
https://github.com/libp2p/js-libp2p/releases/tag/webrtc-v6.0.28
https://github.com/libp2p/js-libp2p/security/advisories/GHSA-x3m2-6mg8-vj7f

Configurations

No configuration.

History

15 Oct 2026, 18:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-15 18:17

Updated : 2026-10-16 20:04

NVD link : CVE-2026-103936

Mitre link : CVE-2026-103936

CVE.ORG link : CVE-2026-103936

JSON object : View

Products Affected

No product.

CWE

CWE-248

Uncaught Exception

CWE-755

Improper Handling of Exceptional Conditions

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