CVE-2026-35405

libp2p-rendezvous: Unlimited namespace registrations per peer enables OOM DoS on rendezvous servers

State: Published
Severity: 7.5 High
Published: Apr 7, 2026
Updated: Apr 9, 2026
Reserved: Apr 2, 2026

Description

libp2p-rust is the official rust language Implementation of the libp2p networking stack. Prior to 0.17.1, libp2p-rendezvous server has no limit on how many namespaces a single peer can register. A malicious peer can just keep registering unique namespaces in a loop and the server happily accepts every single one allocating memory for each registration with no pushback. Keep doing this long enough (or with multiple sybil peers) and the server process gets OOM killed. This vulnerability is fixed in 0.17.1.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	GitHub_M

Weaknesses

CWE-770 Allocation of Resources Without Limits or Throttling

Affected Products

Product	Versions
rust-libp2plibp2p	< 0.17.1Affected

References

https://github.com/libp2p/rust-libp2p/security/advisories/GHSA-cqfx-gf56-8x59

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