CVE-2025-53506

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Source
https://cve.org/CVERecord?id=CVE-2025-53506
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-53506.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2025-53506
Aliases
Downstream
Related
Published
2025-07-10T19:14:23.249Z
Modified
2026-05-18T05:58:11.074114971Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
Apache Tomcat: DoS via excessive h2 streams at connection start
Details

Uncontrolled Resource Consumption vulnerability in Apache Tomcat if an HTTP/2 client did not acknowledge the initial settings frame that reduces the maximum permitted concurrent streams.

This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.8, from 10.1.0-M1 through 10.1.42, from 9.0.0.M1 through 9.0.106. The following versions were EOL at the time the CVE was created but are known to be affected: 8.5.0 through 8.5.100. Other EOL versions may also be affected.

Users are recommended to upgrade to version 11.0.9, 10.1.43 or 9.0.107, which fix the issue.

Database specific 
{
    "cna_assigner": "apache",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/53xxx/CVE-2025-53506.json",
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "introduced": "11.0.0-M1"
                },
                {
                    "last_affected": "11.0.8"
                },
                {
                    "introduced": "10.1.0-M1"
                },
                {
                    "last_affected": "10.1.42"
                },
                {
                    "introduced": "9.0.0.M1"
                },
                {
                    "last_affected": "9.0.106"
                },
                {
                    "introduced": "8.5.0"
                },
                {
                    "last_affected": "8.5.100"
                }
            ]
        },
        {
            "source": "DESCRIPTION",
            "extracted_events": [
                {
                    "introduced": "11.0.0-M1"
                },
                {
                    "fixed": "11.0.8"
                },
                {
                    "introduced": "10.1.0-M1"
                },
                {
                    "fixed": "10.1.42"
                },
                {
                    "introduced": "9.0.0.M1"
                },
                {
                    "fixed": "9.0.106"
                },
                {
                    "introduced": "8.5.0"
                },
                {
                    "fixed": "8.5.100"
                }
            ]
        }
    ],
    "cwe_ids": [
        "CWE-400"
    ]
}
References

Affected packages

Git / github.com/apache/tomcat

Affected ranges

Type
GIT
Repo
https://github.com/apache/tomcat
Events
Introduced
16bf392c67833ad549733b58c350ff92b5ee782a
Last affected
05ccf0c3e22d388f0cf853e32485d8249d051f2f
Introduced
e9d17cddc285615807ec5fef09240777436b25dc
Last affected
0289da4f342744334e0fc5a53ee958e68024fead
Introduced
56e547d387ab49f688c93fe9ca082b1b5d94deed
Last affected
8a48dcb90f13f1670632e763e945f4cc9ef869e6
Database specific 
{
    "cpe": "cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*",
    "source": "CPE_FIELD",
    "extracted_events": [
        {
            "introduced": "9.0.0"
        },
        {
            "last_affected": "9.0.106"
        },
        {
            "introduced": "10.1.0"
        },
        {
            "last_affected": "10.1.42"
        },
        {
            "introduced": "11.0.0"
        },
        {
            "last_affected": "11.0.8"
        }
    ]
}

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-53506.json"