What is CVE-2026-35405?

CVE-2026-35405 is a high-severity vulnerability in Libp2p Rust-libp2p, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-04-07.

How severe is CVE-2026-35405?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Libp2p Rust-libp2p

CVE-2026-35405

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…

EPSS: 0.001 (23.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Libp2p Rust-libp2p — versions < 0.17.1

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

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

Frequently asked questions

What is CVE-2026-35405?: CVE-2026-35405 is a high-severity vulnerability in Libp2p Rust-libp2p, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-04-07.
How severe is CVE-2026-35405?: High severity. CVSS v3 base score is 7.5 out of 10.