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CVE-2026-33870 is an HTTP request-smuggling vulnerability in Netty HTTP/1.1 handling. Netty versions before 4.1.132.Final and 4.2.10.Final incorrectly parse quoted strings in chunked transfer-encoding extension values. A specially crafted chunked request can therefore be interpreted inconsistently by Netty and an upstream or downstream HTTP component, allowing request-boundary desynchronization.
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No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
39 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A request smuggling vulnerability in netty-codec-http caused by incorrect parsing of HTTP/1.1 chunked transfer encoding extension values.
A previously disclosed Netty denial-of-service/request smuggling vulnerability mentioned only as part of vendor security history.
A Netty request smuggling vulnerability caused by incorrect parsing of HTTP/1.1 chunked transfer encoding extension values.
A request smuggling vulnerability in io.netty/netty-codec-http due to incorrect parsing of HTTP/1.1 chunked transfer encoding extension values.
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.