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CVE-2026-35457

Protocol Libp2p denial of service

8.2 HIGHPublic exploitEPSS 0.42%
  1. Published7 Apr 2026

Description

libp2p-rust is the official rust language Implementation of the libp2p networking stack. Prior to 0.17.1, the rendezvous server stores pagination cookies without bounds. An unauthenticated peer can repeatedly issue DISCOVER requests and force unbounded memory growth. This vulnerability is fixed in 0.17.1.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityNone
IntegrityLow
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

Affected products

Protocol Libp2p< 0.17.1

Remediation

Fixed in
Protocol Libp2p≥ 0.17.1

References

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Frequently asked

Is CVE-2026-35457 being actively exploited?

CVE-2026-35457 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.42%.

How severe is CVE-2026-35457?

CVE-2026-35457 has a CVSS 3.1 base score of 8.2, rated high. EPSS estimates a 0.42% probability of exploitation.

Which products are affected by CVE-2026-35457?

Affected products include Protocol Libp2p.

How do I fix CVE-2026-35457?

Upgrade affected software to a fixed version, for example Protocol Libp2p 0.17.1 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-35457 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.