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CVE-2026-55276 is an Always-Incorrect Control Flow Implementation flaw in Apache Tomcat's effective web.xml logging. When Tomcat generates logged effective deployment-descriptor output, the implementation can omit special roles and empty authorization constraints, producing an incomplete representation of the application's effective authorization configuration. Affected versions are Tomcat 11.0.0-M1 through 11.0.22, 10.1.0-M1 through 10.1.55, 9.0.0-M1 through 9.0.118, and 8.5.0 through 8.5.100. End-of-support releases may also be affected.
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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.
23 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability referenced in a Nutanix AOS security notice/plugin, but no specific technical details are provided in the content.
An Apache Tomcat vulnerability addressed in the July 2026 security update; specific technical details are not provided in the content.
An Apache Tomcat logging defect caused the logged effective web.xml to omit special roles and empty authorization constraints. It affects Tomcat 8.5, 9.0, 10.1, and 11.0 release ranges.
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.