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CVE-2026-44893 is a denial-of-service vulnerability in Netty's netty-codec-haproxy module before 4.1.135.Final and 4.2.15.Final. When HAProxyMessage.readNextTLV() decodes a PP2_TYPE_SSL TLV, it retains a slice of the input buffer before reading the mandatory one-byte client field and four-byte verify field. A malicious TLV length below five causes the subsequent reads to throw IndexOutOfBoundsException. HAProxyMessageDecoder handles HAProxyProtocolException but not this exception, allowing it to propagate without releasing the retained slice from the pooled cumulation buffer.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
26 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A denial-of-service vulnerability in netty-codec-haproxy triggered by a malformed HAProxy message.
A Netty HAProxy codec denial-of-service vulnerability triggered by malformed HAProxy messages.
A Netty HAProxy codec vulnerability that can cause denial of service via malformed HAProxy messages.
A Netty HAProxy codec denial-of-service vulnerability triggered by a malformed HAProxy message.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.