CVE-2026-48748

Netty HTTP/3 QPACK Blocked Streams Memory Exhaustion

Published: Jun 12, 2026Updated: Aug 4, 2026 Sources: CVE List NVD BDUCWE-770

7.5HIGH

Description

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:NConfidentiality

None

I:NIntegrity

None

A:HAvailability

High

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Weaknesses

CWE-770

Affected Products

netty

oss-projectaka io.netty:netty, netty-incubator-codec-ohttp

nettyLibraryLibrary

OSS Libraries / generic-library

Сообщество свободного программного обеспечения

oss-projectaka fsf

NettyOn-premLibrary

OSS Libraries / generic-library

Exploitability

Official Patch Available

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique

Impact

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References

https://github.com/netty/netty/security/advisories/GHSA-4grm-h2qv-h6w6

github.com

https://github.com/netty/netty/commit/75127cab731ee35068d1f0667bffa188bc332f5d

github.com

https://github.com/netty/netty/releases/tag/netty-4.2.15.Final

github.com

and 6 more references View all →

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