Vulnerability-Lookup

UBUNTU-CVE-2026-86246 (CVE-2026-86246)

Vulnerability from osv_ubuntu – Published: 2026-09-24 00:00 – Updated: 2026-09-24 00:00 – Source website

Details

Initialization of a resource with an insecure default vulnerability in Apache Tomcat Native enabled insecure options by default including ALLOW_CLIENT_RENEGOTIATION, NO_EXTENDED_MASTER_SECRET, IGNORE_UNEXPECTED_EOF and ALLOW_NO_DHE_KEX. This issue affects Apache Tomcat Native: from 2.0.0 through 2.0.15, from 1.3.0 through 1.3.8. Earlier unsupported versions may also be affected. Users are recommended to upgrade to version 2.0.16 or 1.3.9, which fix the issue.

Severity

9.1 (Critical)


                    
                      CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-86246	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-86246	REPORT
	https://lists.apache.org/thread/dgyvfwb24nbk45ptv…	REPORT
	http://www.openwall.com/lists/oss-security/2026/0…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libtcnative-1",
            "binary_version": "1.1.33-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "tomcat-native",
        "purl": "pkg:deb/ubuntu/tomcat-native@1.1.33-1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.1.33-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libtcnative-1",
            "binary_version": "1.2.21-1~18.04.1build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "tomcat-native",
        "purl": "pkg:deb/ubuntu/tomcat-native@1.2.21-1~18.04.1build1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.2.14-1",
        "1.2.16-1",
        "1.2.16-1build1",
        "1.2.21-1~18.04.1",
        "1.2.21-1~18.04.1build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libtcnative-1",
            "binary_version": "1.2.23-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "tomcat-native",
        "purl": "pkg:deb/ubuntu/tomcat-native@1.2.23-1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
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      ],
      "versions": [
        "1.2.23-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libtcnative-1",
            "binary_version": "1.2.31-1build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "tomcat-native",
        "purl": "pkg:deb/ubuntu/tomcat-native@1.2.31-1build1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.2.26-1",
        "1.2.31-1",
        "1.2.31-1build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libtcnative-2",
            "binary_version": "2.0.14-1~24.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "tomcat-native",
        "purl": "pkg:deb/ubuntu/tomcat-native@2.0.14-1~24.04.1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.2.35-1",
        "1.2.35-1build1",
        "1.2.35-1build2",
        "2.0.14-1~24.04.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libtcnative-2",
            "binary_version": "2.0.14-1~26.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "tomcat-native",
        "purl": "pkg:deb/ubuntu/tomcat-native@2.0.14-1~26.04.1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.3.1-1",
        "1.3.1-1build1",
        "2.0.14-1~26.04.1"
      ]
    }
  ],
  "aliases": [],
  "details": "Initialization of a resource with an insecure default vulnerability in Apache Tomcat Native enabled insecure options\u00a0by default  including ALLOW_CLIENT_RENEGOTIATION, NO_EXTENDED_MASTER_SECRET, IGNORE_UNEXPECTED_EOF and ALLOW_NO_DHE_KEX. This issue affects Apache Tomcat Native: from 2.0.0 through 2.0.15, from 1.3.0 through 1.3.8. Earlier unsupported versions may also be affected. Users are recommended to upgrade to version 2.0.16 or 1.3.9, which fix the issue.",
  "id": "UBUNTU-CVE-2026-86246",
  "modified": "2026-09-24T00:00:00Z",
  "published": "2026-09-24T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-86246"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-86246"
    },
    {
      "type": "REPORT",
      "url": "https://lists.apache.org/thread/dgyvfwb24nbk45ptvlhdyhdhl5o7k5ol"
    },
    {
      "type": "REPORT",
      "url": "http://www.openwall.com/lists/oss-security/2026/09/23/32"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-86246"
  ]
}

CVE-2026-86246 (GCVE-0-2026-86246)

Vulnerability from cvelistv5 – Published: 2026-09-23 12:26 – Updated: 2026-09-23 18:10

Title

Apache Tomcat Native: Insecure OpenSSL options enabled

Summary

Severity

9.1 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-23 15:29 UTC

CWE

CWE-1188 - Initialization of a resource with an insecure default

Assigner

apache mitre root

References

2 references

URL	Tags
https://lists.apache.org/thread/dgyvfwb24nbk45ptv…	vendor-advisory
http://www.openwall.com/lists/oss-security/2026/0…

Impacted products

1 product

Vendor	Product	Version
Apache Software Foundation	Apache Tomcat Native	Affected: 2.0.0 , ≤ 2.0.15 (semver) Affected: 1.3.0 , ≤ 1.3.8 (semver)

Show details on NVD website

JSON

To clipboard

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              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 9.1,
              "baseSeverity": "CRITICAL",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
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                    "Technical Impact": "total"
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                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-23T15:29:46.583140Z",
                "version": "2.0.3"
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            "url": "http://www.openwall.com/lists/oss-security/2026/09/23/32"
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    "cna": {
      "affected": [
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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UBUNTU-CVE-2026-86246 (CVE-2026-86246)

CVE-2026-86246 (GCVE-0-2026-86246)

Tags

Sightings

Nomenclature

Related by attack behaviour