{"id":"CVE-2026-45783","aliases":["GHSA-32mq-hpph-xfvr"],"url":"https://o3.security/vulnerability/CVE-2026-45783","summary":"libp2p: Unvalidated PUT_VALUE records allow unbounded disk exhaustion on DHT server nodes","details":"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.","published":"2026-06-10T21:09:40.499Z","modified":"2026-08-12T03:51:15.300690055Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"@libp2p/kad-dht","fixedVersion":"16.2.6"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45783.json"},{"type":"ADVISORY","url":"https://github.com/libp2p/js-libp2p/security/advisories/GHSA-32mq-hpph-xfvr"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45783"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:15.300690055Z"}}