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CVE-2026-45673 is a DNS cache-poisoning vulnerability in Netty's DNS resolver. Affected versions generate DNS transaction IDs with a predictable pseudorandom-number generator and, by default, reuse a static UDP source port. The resulting reduction in query entropy enables an attacker to predict or guess the transaction parameters needed to submit forged DNS responses before the legitimate response arrives, facilitating a Kaminsky-style cache-poisoning attack. Netty corrected the resolver behavior in versions 4.1.135.Final and 4.2.15.Final.
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No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
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28 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Netty DNS resolver vulnerability that can enable DNS cache poisoning via predictable transaction IDs.
A DNS cache poisoning vulnerability in Netty's DNS resolver caused by entropy collapse from a static UDP source port and predictable TXIDs, making spoofed DNS responses feasible.
A companion Netty DNS resolver vulnerability involving predictable PRNG behavior and a default static source port that can facilitate DNS cache poisoning and be chained with CVE-2026-45674.
A Netty DNS resolver cache-poisoning vulnerability caused by predictable DNS transaction IDs and a static UDP source port.
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.
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