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CVE-2026-78383 is an allocation-of-resources-without-limits-or-throttling vulnerability in Apache Tomcat AJP request handling. An unauthenticated AJP request with an absent request body can cause an AJP processing thread to remain pinned. Repeated requests can consume available AJP processing threads and prevent normal request processing. Affected versions are Tomcat 11.0.0-M1 through 11.0.25, 10.1.0-M1 through 10.1.59, and 9.0.0.M1 through 9.0.121. End-of-life 8.5.0 through 8.5.100 and 7.0.0 through 7.0.109 are also known to be affected.
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No public exploit code observed for this vulnerability.
11 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An AJP availability flaw that can pin a processing thread when handling a request without a body.
An Apache Tomcat AJP denial-of-service vulnerability that can pin a processing thread for requests without a body.
An unauthenticated denial-of-service vulnerability in Apache Tomcat's AJP handling. A malicious AJP request can pin an AJP processing thread, exhausting available processing resources.
Apache Tomcat AJP denial-of-service vulnerability caused by unbounded resource allocation that allows unauthenticated requests to pin AJP processing threads.
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.