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CVE-2026-35405

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

Published: Apr 7, 2026Updated: Apr 24, 2026 Sources: CVE List NVD BDUCWE-770
NVD MITRE
7.5CVSSHIGH
EPSS Score
0.4%
Top 68.9%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-770

Affected Products

libp2pprotocol
Mixed
OSS Libraries / generic-library
rust-libp2plibp2p
Library
OSS Libraries / generic-library
libp2p-rustСообщество свободного программного обеспечения
On-prem
Operating Systems / linux-distro
protocoloss-projectOSS Librariesaka libp2p, go-ipfs, go-ipld-prime, protocol labs
libp2poss-projectOSS Librariesaka rust-libp2p, go-libp2p, rust-yamux
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

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

Timeline

Published
Apr 7, 2026
Last Updated
Apr 24, 2026

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