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TI-2026-33520 Aliases CVE-2026-45783GHSA-32mq-hpph-xfvr

libp2p: Unvalidated PUT_VALUE records allow unbounded disk exhaustion on DHT server nodes

Priority HIGH 66CWE-20Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-400.

Summary

libp2p is a JavaScript Implementation of libp2p networking stack. Prior to version 16.2.6, an unauthenticated remote peer can exhaust the disk storage of any @libp2p/kad-dht node running in server mode by sending an unbounded stream of PUT_VALUE messages whose keys bypass all content validation. No credentials, no prior relationship, and no protocol deviation beyond a crafted key are required. The victim node's datastore fills until the host disk is exhausted, making the node unavailable. This issue has been patched in version 16.2.6.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00354 29th percentileScored 2026-11-07
Fix Fixed js-libp2p (libp2p): 16.2.6@libp2p/kad-dht (npm): 16.2.6

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
libp2pjs-libp2pbefore 16.2.616.2.6Patch availableCNA
—@libp2p/kad-dht (npm)before 16.2.616.2.6Patch availableGHSA-32mq-hpph-xfvr
  • js-libp2p Vendorlibp2p Affected before 16.2.6 Fixed in 16.2.6 Patch available CNA
  • @libp2p/kad-dht (npm) Vendor— Affected before 16.2.6 Fixed in 16.2.6 Patch available GHSA-32mq-hpph-xfvr

Remediation

  • Fix · CNA js-libp2p (libp2p) Fixed in 16.2.6
  • Fix · GHSA-32mq-hpph-xfvr @libp2p/kad-dht (npm) Fixed in 16.2.6 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-45783
  2. 2026-10-03 Alias added: GHSA-32mq-hpph-xfvr

References

Advisory 1

Other 2

  • TI-2026-60386 libp2p-rendezvous through 0.17.1 Denial of Service via Unbounded Registration TTL in Discovery Responses CVSS 4.0HIGH 8.7
  • TI-2026-58865 libp2p: PeerStore accepts attacker-signed PeerRecords for a victim peer ID and stores certified attacker addresses CVSS 3.1HIGH 8.2
  • TI-2026-44102 libp2p-quic: Remote panic via certificate expiry race during QUIC handshake CVSS 4.0HIGH 8.2
  • TI-2026-27587 libp2p-rust has unbounded rendezvous DISCOVER cookies enable remote memory exhaustion CVSS 3.1HIGH 8.2
  • TI-2026-58864 libp2p: Gossipsub StrictSign accepts attacker-signed messages as a victim RSA peer ID CVSS 3.1HIGH 7.5
  • TI-2026-53982 libp2p: Circuit relay v2 server reservation refresh leaks abort listeners and allows remote resource exhaustion CVSS 3.1HIGH 7.5
See all 26 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences