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CVE-2026-48059 is an improper memory-management flaw in Netty's HAProxy PROXY protocol v2 codec. In versions before 4.1.135.Final and 4.2.15.Final, parsing a syntactically valid PROXY v2 header containing nested PP2_TYPE_SSL TLVs at nesting depth two or greater follows a successful decode path but leaves the channel's pooled cumulation ByteBuf permanently retained. The HAProxy message can be propagated and released normally and the decoder can remove itself without an exception, while the underlying heap or direct-memory buffer remains pinned.
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A denial-of-service vulnerability in Netty's HAProxy PROXY protocol v2 codec caused by a memory leak from crafted PROXY protocol headers.
A Netty HAProxy PROXY protocol v2 codec denial-of-service vulnerability caused by memory leaks from crafted PROXY protocol headers.
A Netty HAProxy PROXY protocol v2 codec vulnerability that can cause denial of service via memory leak from crafted PROXY protocol headers.
A Netty HAProxy PROXY protocol v2 codec denial-of-service vulnerability caused by a memory leak triggered by crafted PROXY protocol headers.
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Every observed campaign linking this CVE to a named adversary.
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Cross-references every affected SKU, including bundled OEM variants.
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