Vulnerability-Lookup

Vulnerability from bitnami_vulndb

Published

2026-09-11 05:58

Modified

2026-09-11 06:12

Summary

Apache Tomcat: Authentication bypass with JNDIRealm and GSSAPI authenticated bind

Details

This issue affects Apache Tomcat: from 11.0.0 through 11.0.4, from 10.1.0 through 10.1.36, from 9.0.0 through 9.0.100, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109.

Users are recommended to upgrade to version 11.0.5, 10.1.37 or 9.0.101, which fixes the issue.

JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "tomcat",
        "purl": "pkg:bitnami/tomcat"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "9.0.101"
            },
            {
              "introduced": "10.0.0"
            },
            {
              "fixed": "10.1.37"
            },
            {
              "introduced": "11.0.0"
            },
            {
              "fixed": "11.0.5"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-55957"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:apache:tomcat:*:*:*:*:*:maven:*:*"
    ],
    "severity": "High"
  },
  "details": "Missing Critical Step in Authentication vulnerability in Apache Tomcat when the JNDIRealm was configured to authenticate binds using GSSAPI allowed attackers to authenticate without provided the correct password.\n\nThis issue affects Apache Tomcat: from 11.0.0 through 11.0.4, from 10.1.0 through 10.1.36, from 9.0.0 through 9.0.100, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109.\n\nUsers are recommended to upgrade to version 11.0.5, 10.1.37 or 9.0.101, which fixes the issue.",
  "id": "BIT-tomcat-2026-55957",
  "modified": "2026-09-11T06:12:58.744Z",
  "published": "2026-09-11T05:58:24.643Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "http://www.openwall.com/lists/oss-security/2026/06/29/26"
    },
    {
      "type": "ADVISORY",
      "url": "https://lists.apache.org/thread/7fk339o5jvd4mcgsf0chbrn4o525ccjh"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-55957"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "Apache Tomcat: Authentication bypass with JNDIRealm and GSSAPI authenticated bind"
}

CVE-2026-55957 (GCVE-0-2026-55957)

Vulnerability from cvelistv5 – Published: 2026-06-29 20:47 – Updated: 2026-06-30 13:27

Title

Apache Tomcat: Authentication bypass with JNDIRealm and GSSAPI authenticated bind

Summary

Missing Critical Step in Authentication vulnerability in Apache Tomcat when the JNDIRealm was configured to authenticate binds using GSSAPI allowed attackers to authenticate without provided the correct password. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.4, from 10.1.0-M1 through 10.1.36, from 9.0.0.M1 through 9.0.100, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Users are recommended to upgrade to version 11.0.5, 10.1.37 or 9.0.101, which fixes the issue.

Severity

7.3 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-30 13:26 UTC

CWE

CWE-304 - Missing Critical Step in Authentication

Assigner

apache mitre root

References

2 references

URL	Tags
https://lists.apache.org/thread/7fk339o5jvd4mcgsf…	vendor-advisory
http://www.openwall.com/lists/oss-security/2026/0…

Impacted products

1 product

Vendor	Product	Version
Apache Software Foundation	Apache Tomcat	Affected: 11.0.0-M1 , ≤ 11.0.4 (semver) Affected: 10.1.0-M1 , ≤ 10.1.36 (semver) Affected: 9.0.0.M1 , ≤ 9.0.100 (semver) Affected: 8.5.0 , ≤ 8.5.100 (semver) Affected: 7.0.0 , ≤ 7.0.109 (semver) Unknown: 0 , < 7.0.0 (semver)

Credits

Ilan Toyter

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2026-06-29T22:24:34.997Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/06/29/26"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "LOW",
              "baseScore": 7.3,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "LOW",
              "integrityImpact": "LOW",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-55957",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-30T13:26:38.087999Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-30T13:27:37.064Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Apache Tomcat",
          "vendor": "Apache Software Foundation",
          "versions": [
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              "lessThanOrEqual": "11.0.4",
              "status": "affected",
              "version": "11.0.0-M1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "10.1.36",
              "status": "affected",
              "version": "10.1.0-M1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "9.0.100",
              "status": "affected",
              "version": "9.0.0.M1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.5.100",
              "status": "affected",
              "version": "8.5.0",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "7.0.109",
              "status": "affected",
              "version": "7.0.0",
              "versionType": "semver"
            },
            {
              "lessThan": "7.0.0",
              "status": "unknown",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Ilan Toyter"
        }
      ],
      "descriptions": [
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          "lang": "en",
          "supportingMedia": [
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              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eMissing Critical Step in Authentication vulnerability in Apache Tomcat when the JNDIRealm was configured to authenticate binds using GSSAPI allowed attackers to authenticate without provided the correct password.\u003c/p\u003e\u003cp\u003eThis issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.4, from 10.1.0-M1 through 10.1.36, from 9.0.0.M1 through 9.0.100, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109.\u003c/p\u003e\u003cp\u003eUsers are recommended to upgrade to version 11.0.5, 10.1.37 or 9.0.101, which fixes the issue.\u003c/p\u003e"
            }
          ],
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        }
      ],
      "metrics": [
        {
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            "content": {
              "text": "important"
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            "type": "Textual description of severity"
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      "problemTypes": [
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          "descriptions": [
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      "references": [
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          "url": "https://lists.apache.org/thread/7fk339o5jvd4mcgsf0chbrn4o525ccjh"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
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      "title": "Apache Tomcat: Authentication bypass with JNDIRealm and GSSAPI authenticated bind",
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    "datePublished": "2026-06-29T20:47:12.661Z",
    "dateReserved": "2026-06-17T19:25:28.759Z",
    "dateUpdated": "2026-06-30T13:27:37.064Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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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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Vulnerability from bitnami_vulndb

CVE-2026-55957 (GCVE-0-2026-55957)

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