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CVE-2026-59083 is an improper handling of URL hex encoding vulnerability in Apache Tomcat's RewriteValve. Incorrect decoding of rewritten request URIs can cause security constraints to be evaluated differently from the effective rewritten resource path, permitting a security-constraint or access-control bypass in affected configurations. Affected releases are Tomcat 8.5.0 through 8.5.100, 9.0.0.M1 through 9.0.119, 10.1.0-M1 through 10.1.56, and 11.0.0-M1 through 11.0.23. Unsupported Tomcat versions 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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18 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.
A security constraint bypass vulnerability in Apache Tomcat's rewrite valve caused by improper handling of URL hex encoding.
A low-severity Apache Tomcat vulnerability in RewriteValve where incorrect URL decoding in rewritten URIs may allow security control bypass in some configurations.
An Apache Tomcat RewriteValve vulnerability involving incorrect URL decoding / improper handling of hex-encoded URL data that may allow security constraint bypass in some configurations.
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.