CVE-2026-48748
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
ProductNetty
PublishedJun 12, 2026
First seenJun 12, 2026
Weakness typeCWE-770Allocation of resources without limits
How to fix
Update
- netty netty4.2.15 or later
- io.netty:netty-codec-http34.2.15.Final or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| netty netty | 4.2.0 ≤ v < 4.2.15 | 4.2.15 |
| io.netty:netty-codec-http3Maven | 4.2.0.Final ≤ v < 4.2.15.Final | 4.2.15.Final |
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