CVE-2026-35405
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
ProductProtocol Libp2p
PublishedApr 7, 2026
First seenApr 7, 2026
Weakness typeCWE-770Allocation of resources without limits
How to fix
Update
- protocol libp2p0.17.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| protocol libp2p | v < 0.17.1 | 0.17.1 |
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