CVE-2026-48748CWE-770denial-of-service

CVE-2026-48748

High · published June 12, 2026

CVSS v3.1
7.5
EPSS
1%
Percentile
52.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00684 · 52.0th percentile
Weakness
CWE-770 · Allocation of Resources Without Limits or Throttling
Published
2026-06-12T20:16Z
Affected products (1)
ProductVersionsFixed in
netty/netty≥ 4.2.0, < 4.2.154.2.15
References (6)
https://github.com/netty/netty/commit/75127cab731ee35068d1f0667bffa188bc332f5d · [email protected]https://github.com/netty/netty/releases/tag/netty-4.2.15.Final · [email protected]https://github.com/netty/netty/security/advisories/GHSA-4grm-h2qv-h6w6 · [email protected]https://access.redhat.com/security/cve/CVE-2026-48748 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://bugzilla.redhat.com/show_bug.cgi?id=2488441 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-48748.json · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
EPSS history
Timeline
  • 12 JUN 14:45Z
    Netty HTTP/3 QPACK Blocked Streams Memory Exhaustion
    cvelistv5