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CVE-2026-47691 is a DNS cache-poisoning vulnerability in Netty's DNS resolver prior to 4.1.135.Final and 4.2.15.Final. DnsResolveContext.AuthoritativeNameServerList#add accepts NS records in a DNS response AUTHORITY section when the record owner is a suffix of the queried name, rather than enforcing proper bailiwick restrictions. handleWithAdditional can then cache corresponding A records from the ADDITIONAL section in the authoritative DNS server cache under a parent-domain key. Consequently, a nameserver authoritative only for an attacker-controlled subdomain can cause Netty to treat attacker-supplied DNS infrastructure as authoritative for a parent domain.
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io.netty:netty-resolver-dns to 4.1.135.Final or later on the 4.1 release branch, or 4.2.15.Final or later on the 4.2 release branch. Apply vendor-provided product updates that incorporate one of these patched Netty versions.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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49 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability in the libnetty-java package affecting Canonical Ubuntu Linux 24.04 LTS, addressed by Ubuntu Security Notice USN-8742-1.
A critical CVSS 10.0 vulnerability in the Netty-DNS component used by Dell PowerProtect Cyber Recovery. The content states that the flaws can enable manipulation of DNS responses and redirection of victims to attacker-controlled servers.
A Netty DNS resolver vulnerability caused by insufficient bailiwick validation for NS records.
A Netty DNS resolver vulnerability caused by insufficient bailiwick validation for NS records.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
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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.