{"id":"CVE-2026-34486","published":"2026-04-09T20:16:25Z","modified":"2026-10-26T22:10:00Z","title":"Apache Tomcat Missing Encryption of Sensitive Data Vulnerability","vendor":"Apache","product":"Tomcat","tier":"core","eol":null,"description":{"text":"Missing Encryption of Sensitive Data vulnerability in Apache Tomcat due to the fix for CVE-2026-29146 allowing the bypass of the EncryptInterceptor.\n\nThis issue affects Apache Tomcat: 11.0.20, 10.1.53, 9.0.116.\n\nUsers are recommended to upgrade to version 11.0.21, 10.1.54 or 9.0.117, which fix the issue.","provenance":"source","from":"NVD"},"summary":null,"cvss":{"score":7.5,"severity":"HIGH","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","provenance":"source","from":"NVD"},"epss":{"score":0.98503,"percentile":0.9992,"date":"2026-10-30","provenance":"source"},"kev":{"dateAdded":"2026-08-04","dueDate":"2026-08-07","ransomware":false,"requiredAction":"Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.","notes":"https://lists.apache.org/thread/9510k5p5zdvt9pkkgtyp85mvwxo2qrly ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-34486","provenance":"source"},"vulncheckKev":{"dateAdded":"2026-07-30","exploitedFirstSeen":"2026-07-30","ransomware":false,"evidence":[{"url":"https://unit42.paloaltonetworks.com/autonomous-ai-cyber-attack-campaign/","date":"2026-07-30"},{"url":"https://socradar.io/blog/snowlight-government-chinese-campaign/","date":"2026-07-31"},{"url":"https://previdian.com/CVE-2026-34486","date":"2026-08-04"},{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2026-08-04"},{"url":"https://www.hkcert.org/security-bulletin/apache-tomcat-multiple-vulnerabilities_20260805","date":"2026-08-05"},{"url":"https://cydome.io/maritime-cybersecurity-bulletin-august-7th-2026/","date":"2026-08-07"},{"url":"https://www.recordedfuture.com/blog/july-2026-cve-landscape","date":"2026-08-07"},{"url":"https://www.tenable.com/blog/the-agentic-ai-threat-cluster-seven-incidents-three-actors-and-what-they-mean","date":"2026-08-14"},{"url":"https://www.recordedfuture.com/blog/august-2026-cve-landscape","date":"2026-09-08"}],"evidenceTotal":9,"provenance":"source"},"exploited":true,"otx":{"pulseCount":50,"pulses":[{"name":"Actively_Exploited_Kev | Oct 31, 2026","url":"https://otx.alienvault.com/pulse/6ae4aefab0c2191cecd41862","created":"2026-10-30"},{"name":"Actively_Exploited_Kev | Oct 30, 2026","url":"https://otx.alienvault.com/pulse/6ae35d889ea92b4ce19c2680","created":"2026-10-29"},{"name":"Actively_Exploited_Kev | Oct 29, 2026","url":"https://otx.alienvault.com/pulse/6ae20c1db17e7057ae7d9ad1","created":"2026-10-28"},{"name":"Actively_Exploited_Kev | Oct 28, 2026","url":"https://otx.alienvault.com/pulse/6ae0ba7e0e2a97ff7b218819","created":"2026-10-27"},{"name":"Actively_Exploited_Kev | Oct 27, 2026","url":"https://otx.alienvault.com/pulse/6adf68b85c3e852f3c111d18","created":"2026-10-26"},{"name":"Actively_Exploited_Kev | Oct 24, 2026","url":"https://otx.alienvault.com/pulse/6adb740e397c3ad4799aa4cd","created":"2026-10-23"},{"name":"Actively_Exploited_Kev | Oct 23, 2026","url":"https://otx.alienvault.com/pulse/6ada236fcfba2dfa730ea482","created":"2026-10-22"},{"name":"Actively_Exploited_Kev | Oct 22, 2026","url":"https://otx.alienvault.com/pulse/6ad8d33a077cbb5cab524d80","created":"2026-10-21"},{"name":"Actively_Exploited_Kev | Oct 21, 2026","url":"https://otx.alienvault.com/pulse/6ad78130c4d1ac2be83a8b6d","created":"2026-10-20"},{"name":"Actively_Exploited_Kev | Oct 20, 2026","url":"https://otx.alienvault.com/pulse/6ad62f63c24a405a3423cc13","created":"2026-10-19"}],"provenance":"machine"},"cwes":[{"id":"CWE-311","name":"Missing Encryption of Sensitive Data"},{"id":"CWE-807","name":"Reliance on Untrusted Inputs in a Security Decision"}],"references":[{"url":"https://lists.apache.org/thread/9510k5p5zdvt9pkkgtyp85mvwxo2qrly","tags":["Mailing List","Vendor Advisory"]},{"url":"https://www.vicarius.io/vsociety/posts/cve-2026-34486-detection-script-rce-on-apache-tomcat","tags":["Third Party Advisory"]},{"url":"https://www.vicarius.io/vsociety/posts/cve-2026-34486-mitigation-script-rce-on-apache-tomcat","tags":["Mitigation","Third Party Advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:36787","tags":["Third Party Advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:36788","tags":["Third Party Advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:36789","tags":["Third Party Advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:36790","tags":["Third Party Advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:36876","tags":["Third Party Advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:36877","tags":["Third Party Advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:36878","tags":["Third Party Advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:36879","tags":["Third Party Advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:37136","tags":["Third Party Advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:37137","tags":["Third Party Advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:38505","tags":["Third Party Advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:39188","tags":["Third Party Advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:39189","tags":["Third Party Advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-34486","tags":["Third Party Advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2457027","tags":["Issue Tracking","Third Party Advisory"]},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34486.json","tags":["Third Party Advisory"]},{"url":"https://socradar.io/blog/snowlight-government-chinese-campaign/","tags":["Third Party Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-34486","tags":["US Government Resource"]}],"techniques":[{"id":"T1040","name":"Network Sniffing","tactics":["credential-access","discovery"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: Bypass enables network traffic interception and 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