CVE-2026-56819
1 advisory.
Maven/io.netty:netty-codec-http2 CVE-2026-56819: high 7.5, EPSS 0.66%
Netty: HTTP/2 decompression leaks ByteBuf reference count when the decompressor channel is already closed (Direct memory leak / OOM DoS)
Action: Upgrade io.netty:netty-codec-http2 to 4.1.136.Final (4.1.x) or 4.2.16.Final (4.2.x) or later.
Affected
| introduced | fixed | last affected |
|---|---|---|
| 4.2.0 | 4.2.16.Final | - |
| 4.1.0.Final | 4.1.136.Final | - |
Fixed versions
| 4.2.16.Final | 4.1.136.Final |
Sources
- osv: GHSA-93wv-jw9v-4972
- https://github.com/netty/netty/security/advisories/GHSA-93wv-jw9v-4972
- https://nvd.nist.gov/vuln/detail/CVE-2026-56819
- https://github.com/netty/netty/commit/5b68c61f37aa4a3045cba624cbea239655c9003b
- https://github.com/netty/netty/commit/bb2ff68a1fb71cb4b0eb9a9e17b66c52aff680c6
- https://github.com/netty/netty
- https://github.com/netty/netty/releases/tag/netty-4.1.136.Final
- https://github.com/netty/netty/releases/tag/netty-4.2.16.Final
CVE-2026-56819 · published · modified · JSON