CVE-2026-45783
High
Description
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.
SeverityHigh
CVSS7.5
Exploit probability—
Product@libp2p/kad-dht
PublishedJun 10, 2026
First seenJun 10, 2026
How to fix
Update
- @libp2p/kad-dht16.2.6 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| @libp2p/kad-dhtnpm | v < 16.2.6 | 16.2.6 |
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