{
  "crds_version": "0.1",
  "kind": "base",
  "id": "crds:cve-2026-34486",
  "revision": 1,
  "title": "Apache Tomcat — EncryptInterceptor bypass exposes cluster traffic",
  "summary": "Apache Tomcat 11.0.20, 10.1.53 and 9.0.116 ship an incomplete fix for CVE-2026-29146 that lets a remote, unauthenticated attacker bypass the EncryptInterceptor, leaving data it should protect unencrypted and readable. Exploited in the wild; can be chained with CVE-2025-24813.",
  "source_type": "cve",
  "severity": "high",
  "cvss": {
    "score": 7.5,
    "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
    "version": "3.1"
  },
  "epss": 0.98616,
  "exploitation": {
    "known_exploited": true,
    "exploit_available": false,
    "attack_complexity": "low",
    "kev_added": "2026-08-04",
    "prerequisites": "Network access to a Tomcat 11.0.20, 10.1.53 or 9.0.116 instance that relies on the EncryptInterceptor; no credentials or user interaction needed."
  },
  "remediation": {
    "patch_available": true,
    "fixed_in": [
      "Apache Tomcat 11.0.21",
      "Apache Tomcat 10.1.54",
      "Apache Tomcat 9.0.117"
    ]
  },
  "mitre_attack": [
    "T1190"
  ],
  "kill_chain": "initial_access",
  "recommended_action": "Upgrade Tomcat to 11.0.21, 10.1.54 or 9.0.117 now; this is in CISA KEV, so treat exposed instances as compromised and review for chaining with CVE-2025-24813.",
  "confidence": "medium",
  "provenance": [
    {
      "fields": [
        "cvss",
        "exploitation.attack_complexity",
        "exploitation.exploit_available",
        "references",
        "published_at"
      ],
      "source": "https://nvd.nist.gov/vuln/detail/CVE-2026-34486",
      "retrieved_at": "2026-09-22T06:10:25.213Z",
      "confidence": "high",
      "extractor": "scrty-crds-pipeline/0.1"
    },
    {
      "fields": [
        "exploitation.known_exploited",
        "exploitation.kev_added"
      ],
      "source": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "retrieved_at": "2026-09-22T06:10:25.213Z",
      "confidence": "high",
      "extractor": "scrty-crds-pipeline/0.1"
    },
    {
      "fields": [
        "epss"
      ],
      "source": "https://api.first.org/data/v1/epss?cve=CVE-2026-34486",
      "retrieved_at": "2026-09-22T06:10:25.213Z",
      "confidence": "high",
      "extractor": "scrty-crds-pipeline/0.1"
    },
    {
      "fields": [
        "title",
        "summary",
        "severity",
        "remediation",
        "mitre_attack",
        "kill_chain",
        "recommended_action",
        "confidence",
        "tags",
        "exploitation.prerequisites"
      ],
      "source": "https://nvd.nist.gov/vuln/detail/CVE-2026-34486",
      "retrieved_at": "2026-09-22T06:10:25.213Z",
      "confidence": "high",
      "extractor": "claude-code"
    }
  ],
  "references": [
    {
      "type": "cve",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34486",
      "label": "NVD record"
    },
    {
      "type": "cisa",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "label": "CISA Known Exploited Vulnerabilities catalog"
    },
    {
      "type": "vendor_advisory",
      "url": "https://lists.apache.org/thread/9510k5p5zdvt9pkkgtyp85mvwxo2qrly"
    },
    {
      "type": "vendor_advisory",
      "url": "https://www.vicarius.io/vsociety/posts/cve-2026-34486-mitigation-script-rce-on-apache-tomcat"
    },
    {
      "type": "writeup",
      "url": "https://www.vicarius.io/vsociety/posts/cve-2026-34486-detection-script-rce-on-apache-tomcat"
    }
  ],
  "published_at": "2026-04-09T20:16:25.063Z",
  "issued_at": "2026-09-22T06:10:25.213Z",
  "tags": [
    "apache",
    "tomcat",
    "missing-encryption",
    "encryptinterceptor",
    "kev"
  ]
}