{"id":"CVE-2026-48748","aliases":["GHSA-4grm-h2qv-h6w6"],"url":"https://o3.security/vulnerability/CVE-2026-48748","summary":"Netty HTTP/3 QPACK Blocked Streams Memory Exhaustion","details":"Netty is a network application framework for development of protocol servers and clients. Starting in version 4.2.0.Final and prior to version 4.2.15.Final, a memory exhaustion vulnerability in the Netty HTTP/3 codec allows the creation of an infinite number of blocked streams, which can cause OOM error. Version 4.2.15.Final patches the issue.","published":"2026-06-12T14:45:04.763Z","modified":"2026-08-07T17:02:00.292051Z","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":{"score":0.00392,"percentile":0.32035,"asOf":"2026-08-10"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"io.netty:netty-codec-http3","fixedVersion":"4.2.15.Final"}],"fix":{"url":"https://github.com/netty/netty/commit/75127cab731ee35068d1f0667bffa188bc332f5d","label":"netty/netty@75127ca"},"references":[{"type":"WEB","url":"https://github.com/netty/netty/releases/tag/netty-4.2.15.Final"},{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-48748.json"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-48748"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48748.json"},{"type":"ADVISORY","url":"https://github.com/netty/netty/security/advisories/GHSA-4grm-h2qv-h6w6"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-48748"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2488441"},{"type":"FIX","url":"https://github.com/netty/netty/commit/75127cab731ee35068d1f0667bffa188bc332f5d"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T17:02:00.292051Z"}}