Vulnerability-Lookup

Vulnerability from bitnami_vulndb

Published

2026-05-14 11:56

Modified

2026-05-15 12:24

Summary

Apache Tomcat: WebSocket authentication header exposure

Details

Exposure of HTTP Authentication Header to unexpected hosts during WebSocket authentication vulnerability in Apache Tomcat.

This issue affects Apache Tomcat: from 11.0.0 through 11.0.21, from 10.1.0 through 10.1.54, from 9.0.2 through 9.0.117, from 8.5.24 through 8.5.100, from 7.0.83 through 7.0.109.

Users are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118, which fix the issue.

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "tomcat",
        "purl": "pkg:bitnami/tomcat"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "10.0.0"
            },
            {
              "fixed": "10.1.55"
            },
            {
              "introduced": "11.0.0"
            },
            {
              "fixed": "11.0.22"
            },
            {
              "introduced": "9.0.0"
            },
            {
              "fixed": "9.0.118"
            }
          ],
          "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-2026-42498"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:apache:tomcat:*:*:*:*:*:maven:*:*"
    ],
    "severity": "High"
  },
  "details": "Exposure of HTTP Authentication Header to unexpected hosts during WebSocket authentication vulnerability in Apache Tomcat.\n\nThis issue affects Apache Tomcat: from 11.0.0 through 11.0.21, from 10.1.0 through 10.1.54, from 9.0.2 through 9.0.117, from 8.5.24 through 8.5.100, from 7.0.83 through 7.0.109.\n\nUsers are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118, which fix the issue.",
  "id": "BIT-tomcat-2026-42498",
  "modified": "2026-05-15T12:24:26.484Z",
  "published": "2026-05-14T11:56:44.150Z",
  "references": [
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/05/12/14"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread/n61zwf75jrv09rz90j4jssncm244bwdb"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42498"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "Apache Tomcat: WebSocket authentication header exposure"
}

CVE-2026-42498 (GCVE-0-2026-42498)

Vulnerability from cvelistv5 – Published: 2026-05-12 15:17 – Updated: 2026-05-13 15:59

Title

Apache Tomcat: WebSocket authentication header exposure

Summary

Exposure of HTTP Authentication Header to unexpected hosts during WebSocket authentication vulnerability in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.2 through 9.0.117, from 8.5.24 through 8.5.100, from 7.0.83 through 7.0.109. Users are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118, which fix the issue.

Severity ?

No CVSS data available.

CWE

CWE-200 - Exposure of HTTP Authentication Header to unexpected hosts

Assigner

apache

References

1 reference

URL	Tags
https://lists.apache.org/thread/n61zwf75jrv09rz90…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
Apache Software Foundation	Apache Tomcat	Affected: 11.0.0-M1 , ≤ 11.0.21 (semver) Affected: 10.1.0-M1 , ≤ 10.1.54 (semver) Affected: 9.0.2 , ≤ 9.0.117 (semver) Affected: 8.5.24 , ≤ 8.5.100 (semver) Affected: 7.0.83 , ≤ 7.0.109 (semver)

Credits

lokerxx

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2026-05-12T17:40:58.470Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/05/12/14"
          }
        ],
        "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-2026-42498",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-13T15:58:45.406125Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-13T15:59:04.361Z",
          "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": [
            {
              "lessThanOrEqual": "11.0.21",
              "status": "affected",
              "version": "11.0.0-M1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "10.1.54",
              "status": "affected",
              "version": "10.1.0-M1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "9.0.117",
              "status": "affected",
              "version": "9.0.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.5.100",
              "status": "affected",
              "version": "8.5.24",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.109",
              "status": "affected",
              "version": "7.0.83",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "lokerxx"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eExposure of HTTP Authentication Header to unexpected hosts during WebSocket authentication vulnerability in Apache Tomcat.\u003c/p\u003e\u003cp\u003eThis issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.2 through 9.0.117, from 8.5.24 through 8.5.100, from 7.0.83 through 7.0.109.\u003c/p\u003e\u003cp\u003eUsers are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118, which fix the issue.\u003c/p\u003e"
            }
          ],
          "value": "Exposure of HTTP Authentication Header to unexpected hosts during WebSocket authentication vulnerability in Apache Tomcat.\n\nThis issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.2 through 9.0.117, from 8.5.24 through 8.5.100, from 7.0.83 through 7.0.109.\n\nUsers are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118, which fix the issue."
        }
      ],
      "metrics": [
        {
          "other": {
            "content": {
              "text": "low"
            },
            "type": "Textual description of severity"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-200",
              "description": "CWE-200 Exposure of HTTP Authentication Header to unexpected hosts",
              "lang": "en",
              "type": "CWE"
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        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-12T15:17:56.531Z",
        "orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
        "shortName": "apache"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://lists.apache.org/thread/n61zwf75jrv09rz90j4jssncm244bwdb"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "Apache Tomcat: WebSocket authentication header exposure",
      "x_generator": {
        "engine": "Vulnogram 0.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
    "assignerShortName": "apache",
    "cveId": "CVE-2026-42498",
    "datePublished": "2026-05-12T15:17:56.531Z",
    "dateReserved": "2026-04-27T22:13:05.647Z",
    "dateUpdated": "2026-05-13T15:59:04.361Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Detection rules are retrieved from Rulezet.

Action not permitted

Vulnerability from bitnami_vulndb

CVE-2026-42498 (GCVE-0-2026-42498)

Tags

Sightings

Nomenclature