Vulnerability 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 Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Protocol | Libp2P | < 0.17.1 |
Related Weaknesses (CWE)
References
- https://github.com/libp2p/rust-libp2p/security/advisories/GHSA-cqfx-gf56-8x59ExploitVendor Advisory
- https://github.com/libp2p/rust-libp2p/security/advisories/GHSA-cqfx-gf56-8x59ExploitVendor Advisory
FAQ
What is CVE-2026-35405?
CVE-2026-35405 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 ma...
How severe is CVE-2026-35405?
CVE-2026-35405 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-35405?
Check the references section above for vendor advisories and patch information. Affected products include: Protocol Libp2P.