CVE-2026-48748
Netty HTTP/3 QPACK Blocked Streams Memory Exhaustion
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
Netty is a network application framework for development of protocol servers and clients. 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.
| CWE | CWE-770 |
| Vendor | netty |
| Product | netty |
| Published | Jun 12, 2026 |
| Last Updated | Jul 15, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
netty / netty
>= 4.2.0.Final, < 4.2.15.Final
References
github.com: https://github.com/netty/netty/security/advisories/GHSA-4grm-h2qv-h6w6 github.com: https://github.com/netty/netty/releases/tag/netty-4.2.15.Final access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-48748 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2488441 security.access.redhat.com: https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-48748.json