CVE-2025-53506

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://lists.apache.org/thread/p09775q0rd185m6zz98krg0fp45j8kr0	Issue Tracking Mailing List Vendor Advisory
http://www.openwall.com/lists/oss-security/2025/07/10/13
https://lists.debian.org/debian-lts-announce/2025/07/msg00009.html

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:apache:tomcat::::::::
	cpe:2.3:a:apache:tomcat::::::::
	cpe:2.3:a:apache:tomcat::::::::

History

04 Nov 2025, 22:16

Type	Values Removed	Values Added
References		() http://www.openwall.com/lists/oss-security/2025/07/10/13 - () https://lists.debian.org/debian-lts-announce/2025/07/msg00009.html -

Information

Published : 2025-07-10 20:15

Updated : 2025-11-04 22:16

NVD link : CVE-2025-53506

Mitre link : CVE-2025-53506

CVE.ORG link : CVE-2025-53506

JSON object : View

Products Affected

apache

tomcat

CWE

CWE-400

Uncontrolled Resource Consumption

{"id": "CVE-2025-53506", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "published": "2025-07-10T20:15:26.970", "references": [{"url": "https://lists.apache.org/thread/p09775q0rd185m6zz98krg0fp45j8kr0", "tags": ["Issue Tracking", "Mailing List", "Vendor Advisory"], "source": "[email protected]"}, {"url": "http://www.openwall.com/lists/oss-security/2025/07/10/13", "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://lists.debian.org/debian-lts-announce/2025/07/msg00009.html", "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "[email protected]", "description": [{"lang": "en", "value": "CWE-400"}]}], "descriptions": [{"lang": "en", "value": "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.\n\nThis 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.\nThe following versions were EOL at the time the CVE was created but are \nknown to be affected: 8.5.0 through 8.5.100.\u00a0Other EOL versions may also be affected.\n\n\nUsers are recommended to upgrade to version 11.0.9, 10.1.43 or 9.0.107, which fix the issue."}, {"lang": "es", "value": "Vulnerabilidad de consumo incontrolado de recursos en Apache Tomcat si un cliente HTTP/2 no reconoce el marco de configuraci\u00f3n inicial que reduce el m\u00e1ximo de transmisiones simult\u00e1neas permitidas. Este problema afecta a Apache Tomcat: de 11.0.0-M1 a 11.0.8, de 10.1.0-M1 a 10.1.42, y de 9.0.0.M1 a 9.0.106. Se recomienda actualizar a las versiones 11.0.9, 10.1.43 o 9.0.107, que solucionan el problema."}], "lastModified": "2025-11-04T22:16:21.790", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5D1D5DA0-D03A-4A7A-B0F8-78FBC3229322", "versionEndIncluding": "9.0.106", "versionStartIncluding": "9.0.0"}, {"criteria": "cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "641541D9-6F81-4357-B535-D83D25217A14", "versionEndIncluding": "10.1.42", "versionStartIncluding": "10.1.0"}, {"criteria": "cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C16A32B5-DB24-48E2-BABE-6F60360786DF", "versionEndIncluding": "11.0.8", "versionStartIncluding": "11.0.0"}], "operator": "OR"}]}], "sourceIdentifier": "[email protected]"}