Allocation of resources without limits or throttling vulnerability in Apache Tomcat allows an unauthenticated AJP request to pin an AJP processing thread leading to denial of service.



This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.0.M1 through 9.0.121.



The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other unsupported versions may also be affected.



Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.
Advisories

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Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Wed, 23 Sep 2026 19:30:00 +0000

Type Values Removed Values Added
References

Wed, 23 Sep 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 23 Sep 2026 14:00:00 +0000

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First Time appeared Apache
Apache tomcat
Vendors & Products Apache
Apache tomcat

Wed, 23 Sep 2026 11:45:00 +0000

Type Values Removed Values Added
Description Allocation of resources without limits or throttling vulnerability in Apache Tomcat allows an unauthenticated AJP request to pin an AJP processing thread leading to denial of service. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.0.M1 through 9.0.121. The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.
Title Apache Tomcat: AJP DoS via missing request body
Weaknesses CWE-770
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: apache

Published:

Updated: 2026-09-23T18:10:45.708Z

Reserved: 2026-08-24T13:38:58.809Z

Link: CVE-2026-78383

cve-icon Vulnrichment

Updated: 2026-09-23T15:44:30.673Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-23T12:17:07.213

Modified: 2026-09-23T19:19:21.470

Link: CVE-2026-78383

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-23T18:15:07Z

Weaknesses