CVE catalog

CVE-2026-86243

Buffer over-read vulnerability in Apache Tomcat Native…

[CVE catalog]

Buffer over-read vulnerability in Apache Tomcat Native during the TLS handshake permits a malicious user to trigger a DoS via a JVM crash. 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 1.3.9 or 2.0.16, which fix the issue.

Severity
High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
Updated
Source
[NVD] · [CVE record]
EPSS
0.56% · Oct 27, 2026

Projects and upstream resources

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Version impact has not been established. The original provider fields are retained below.

Provider details and historical evidence
Original provider fields
{
  "package_releases": [
    {
      "name": "tomcat-native",
      "status": "fixed",
      "release": "sid",
      "version": "2.0.16-1"
    },
    {
      "name": "tomcat-native",
      "status": "fixed",
      "release": "forky",
      "version": "2.0.16-1"
    },
    {
      "name": "tomcat-native",
      "status": "vulnerable",
      "release": "trixie",
      "version": "1.3.1-1"
    },
    {
      "name": "tomcat-native",
      "status": "vulnerable",
      "release": "bookworm",
      "version": "1.2.35-1"
    }
  ],
  "fixed_versions": [
    {
      "bug": null,
      "name": "tomcat-native",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "not yet assigned",
      "fixed_version": "2.0.16-1"
    },
    {
      "bug": null,
      "name": "tomcat-native",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "not yet assigned",
      "fixed_version": "2.0.16-1"
    },
    {
      "bug": null,
      "name": "tomcat-native",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "not yet assigned",
      "fixed_version": ""
    },
    {
      "bug": null,
      "name": "tomcat-native",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "not yet assigned",
      "fixed_version": ""
    }
  ],
  "distribution_packages": [
    {
      "name": "tomcat_native",
      "ranges": [
        {
          "fixed": "2.0.16",
          "introduced": "2.0.0",
          "last_affected": "",
          "start_excluding": ""
        }
      ],
      "ecosystem": "cpe",
      "fixed_version": "2.0.16",
      "provider_record_id": "NVD-CVE-2026-86243"
    },
    {
      "name": "libtcnative-1-0",
      "distro": "opensuse",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.3.9-1.1"
            }
          ]
        }
      ],
      "release": "tumbleweed",
      "versions": [],
      "ecosystem": "rpm",
      "fixed_version": "1.3.9-1.1",
      "provider_record_id": "OPENSUSE-SU-2026:11898-1"
    },
    {
      "name": "libtcnative-2-0",
      "distro": "opensuse",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.0.16-1.1"
            }
          ]
        }
      ],
      "release": "tumbleweed",
      "versions": [],
      "ecosystem": "rpm",
      "fixed_version": "2.0.16-1.1",
      "provider_record_id": "OPENSUSE-SU-2026:11899-1"
    }
  ]
}

Publisher notes

[trixie] tomcat-native: Minor issue [bookworm] tomcat-native: Minor issue

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

  • [libtcnative-1]Unknown

    Source package: [tomcat-native]

    Details (2)

    • 1.2.35-1 · amd64 · bookworm

      Affected

      nvd · tomcat-native · debian · bookworm; nvd · tomcat-native · debian · 12

    • 1.2.35-1 · arm64 · bookworm

      Affected

      nvd · tomcat-native · debian · bookworm; nvd · tomcat-native · debian · 12

[Debian 13 (Trixie)]

  • [libtcnative-1]Unknown

    Source package: [tomcat-native]

    Details (2)

    • 1.3.1-1+b1 · amd64 · trixie

      Affected

      nvd · tomcat-native · debian · 13

    • 1.3.1-1+b1 · arm64 · trixie

      Affected

      nvd · tomcat-native · debian · 13

[openSUSE Tumbleweed]

  • [libtcnative-1-0]Unknown

    Source package: [libtcnative-1-0]

    Details (1)

    • 1.3.8-1.3 · x86_64 · tumbleweed

      Affected · Fixed: 1.3.9-1.1

      nvd · libtcnative-1-0 · opensuse · tumbleweed

  • [libtcnative-1-0-devel]Unknown

    Source package: [libtcnative-1-0]

    Details (1)

    • 1.3.8-1.3 · x86_64 · tumbleweed

      Unknown · Fixed: 1.3.9-1.1

      Version impact unknown

      nvd · libtcnative-1-0 · opensuse · tumbleweed

  • [libtcnative-2-0]Unknown

    Source package: [libtcnative-2-0]

    Details (1)

    • 2.0.15-1.3 · x86_64 · tumbleweed

      Affected · Fixed: 2.0.16-1.1

      nvd · libtcnative-2-0 · opensuse · tumbleweed

  • [libtcnative-2-0-devel]Unknown

    Source package: [libtcnative-2-0]

    Details (1)

    • 2.0.15-1.3 · x86_64 · tumbleweed

      Unknown · Fixed: 2.0.16-1.1

      Version impact unknown

      nvd · libtcnative-2-0 · opensuse · tumbleweed

Observed:

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]