Denial of Service Vulnerability in libp2p Networking Stack by Protocol Labs
CVE-2026-103936

7.5HIGH

Key Information:

Vendor

Libp2p

Status
Js-libp2p
Webrtc
Vendor
CVE Published:
15 October 2026

What is CVE-2026-103936?

The libp2p networking stack's JavaScript implementation earlier than version 6.0.28 has a denial of service vulnerability due to unauthenticated STUN Binding Requests being processed without validating the required length and character set of the credential. This flaw allows a single remote UDP packet to trigger an uncaught native 'invalid_argument' exception, leading to process termination and denial of service. The issue has been addressed in version 6.0.28, which ensures that credential validation is enforced before processing.

Affected Version(s)

js-libp2p < 3.3.7

webrtc < 6.0.28

References

https://github.com/libp2p/js-libp2p/security/advisories/G...
x_refsource_CONFIRM
https://github.com/libp2p/js-libp2p/pull/3584
x_refsource_MISC
https://github.com/libp2p/js-libp2p/commit/68794c8e2e67d5...
x_refsource_MISC

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.