CVE-2026-42498

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Source
https://cve.org/CVERecord?id=CVE-2026-42498
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-42498.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-42498
Aliases
Downstream
Related
Published
2026-05-12T15:17:56.531Z
Modified
2026-06-09T09:14:09.360607601Z
Severity
  • 7.3 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L CVSS Calculator
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-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.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42498.json",
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "introduced": "11.0.0-M1"
                },
                {
                    "last_affected": "11.0.21"
                },
                {
                    "introduced": "10.1.0-M1"
                },
                {
                    "last_affected": "10.1.54"
                },
                {
                    "introduced": "9.0.2"
                },
                {
                    "last_affected": "9.0.117"
                },
                {
                    "introduced": "8.5.24"
                },
                {
                    "last_affected": "8.5.100"
                },
                {
                    "introduced": "7.0.83"
                },
                {
                    "last_affected": "7.0.109"
                }
            ]
        },
        {
            "source": "DESCRIPTION",
            "extracted_events": [
                {
                    "introduced": "11.0.0-M1"
                },
                {
                    "fixed": "11.0.21"
                },
                {
                    "introduced": "10.1.0-M1"
                },
                {
                    "fixed": "10.1.54"
                },
                {
                    "introduced": "9.0.2"
                },
                {
                    "fixed": "9.0.117"
                },
                {
                    "introduced": "8.5.24"
                },
                {
                    "fixed": "8.5.100"
                },
                {
                    "introduced": "7.0.83"
                },
                {
                    "fixed": "7.0.109"
                }
            ]
        }
    ],
    "cna_assigner": "apache",
    "cwe_ids": [
        "CWE-200"
    ]
}
References

Affected packages

Git / github.com/apache/tomcat

Affected ranges

Type
GIT
Repo
https://github.com/apache/tomcat
Events
Introduced
e498667bd7811e846771a852b16ce9f1e524b81b
Last affected
2cdef2c0241cdf70b5edd88d3733a52e6b675047
Introduced
e37b977db6f47e4380ad67114a49e8568951c953
Last affected
eddcf278ad919382608ada1898b2c5b63675c6d5
Database specific 
{
    "source": "CPE_RANGE",
    "cpe": "cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "7.0.0"
        },
        {
            "last_affected": "7.0.109"
        },
        {
            "introduced": "8.5.0"
        },
        {
            "last_affected": "8.5.100"
        }
    ]
}

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-42498.json"