{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/tags/tomcat/feed.json","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["Tomcat"],"_cs_severities":["medium"],"_cs_tags":["apache","tomcat","security-bypass"],"_cs_type":"advisory","_cs_vendors":["Apache"],"content_html":"\u003cp\u003eA vulnerability in Apache Tomcat allows a remote, anonymous attacker to bypass security measures. The specific nature of the vulnerability is not detailed in the source material. This security bypass could potentially lead to unauthorized access or modification of data, depending on the specific security measures in place and the configuration of the Tomcat server. Defenders should investigate and patch Tomcat instances.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eThe attacker identifies a vulnerable Apache Tomcat instance.\u003c/li\u003e\n\u003cli\u003eThe attacker crafts a specific HTTP request to exploit the vulnerability.\u003c/li\u003e\n\u003cli\u003eTomcat processes the malicious request, failing to properly enforce security checks.\u003c/li\u003e\n\u003cli\u003eThe attacker gains unauthorized access to restricted resources.\u003c/li\u003e\n\u003cli\u003eThe attacker may read sensitive configuration files.\u003c/li\u003e\n\u003cli\u003eThe attacker may deploy malicious web applications.\u003c/li\u003e\n\u003cli\u003eThe attacker may modify existing web application code.\u003c/li\u003e\n\u003cli\u003eThe attacker compromises the Tomcat server or applications it hosts.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of this vulnerability could lead to unauthorized access to sensitive information, modification of critical data, or complete compromise of the affected Apache Tomcat server. The number of potential victims is unknown, but any organization using Apache Tomcat without the appropriate security patches is at risk. Sectors heavily reliant on web applications and services are most likely to be targeted.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eInvestigate all Apache Tomcat installations for potential exposure.\u003c/li\u003e\n\u003cli\u003eMonitor web server logs for suspicious activity indicating attempts to bypass security measures using the provided Sigma rules.\u003c/li\u003e\n\u003cli\u003eApply the latest security patches provided by Apache to mitigate the identified vulnerability.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-05-19T12:15:24Z","date_published":"2026-05-19T12:15:24Z","id":"https://feed.craftedsignal.io/briefs/2026-05-apache-tomcat-security-bypass/","summary":"A remote, anonymous attacker can exploit a vulnerability in Apache Tomcat to bypass security measures.","title":"Apache Tomcat Security Bypass Vulnerability","url":"https://feed.craftedsignal.io/briefs/2026-05-apache-tomcat-security-bypass/"}],"language":"en","title":"CraftedSignal Threat Feed — Tomcat","version":"https://jsonfeed.org/version/1.1"}