CVE-2026-45783Public exploitNetwork attack vector

Remote disk exhaustion via unvalidated DHT records

Published Jun 10, 2026 · Updated Jun 10, 2026

Uncontrolled resource consumption in @libp2p/kad-dht before 16.2.6 allows remote attackers to exhaust server-node disk storage. verifyRecord returns without validation when a record key has fewer than three slash-delimited parts, after which PUT_VALUE handling persists the record while the RPC loop accepts an unbounded message stream. A reachable server-mode node and a standard libp2p TLS handshake are sufficient; filling the datastore partition makes the node unavailable.

CVSS severity7.5
High
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled resource consumption in @libp2p/kad-dht before 16.2.6 allows remote attackers to exhaust server-node disk storage. verifyRecord returns without validation when a record key has fewer than three slash-delimited parts, after which PUT_VALUE handling persists the record while the RPC loop accepts an unbounded message stream. A reachable server-mode node and a standard libp2p TLS handshake are sufficient; filling the datastore partition makes the node unavailable.

The record

CVE
CVE-2026-45783
Published
Jun 10, 2026
Updated
Jun 10, 2026
Vendor
libp2p
Product
js-libp2p
Classifications
CWE-400, CWE-20, T1499.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 16.2.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

libp2p · js-libp2pversion=< 16.2.6

Published CVSS scores

7.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
CWE-20Improper Input Validation
T1499.003Application Exhaustion Flood

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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