high7.5
CVE-2026-48748
Netty is a network application framework for development of protocol servers and clients.
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| maven | io.netty:netty-codec-http3 | >= 4.2.0.Final, <= 4.2.14.Final | 4.2.15.Final |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Netty | Netty | from 4.2.0 before 4.2.15 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-4grm-h2qv-h6w6
- https://github.com/netty/netty/security/advisories/GHSA-4grm-h2qv-h6w6
- https://nvd.nist.gov/vuln/detail/CVE-2026-48748
- https://github.com/netty/netty/releases/tag/netty-4.2.15.Final
- https://github.com/netty/netty/commit/75127cab731ee35068d1f0667bffa188bc332f5d
- https://access.redhat.com/security/cve/CVE-2026-48748
- https://bugzilla.redhat.com/show_bug.cgi?id=2488441
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-48748.json