Skip to main content

Apache Tomcat EUVDEUVD-2026-85230

| CVE-2026-78383 HIGH
Allocation of Resources Without Limits or Throttling (CWE-770)
2026-09-23 apache GHSA-rpxf-vjhq-9cv9
Denial Of Service Apache Java Red Hat Tomcat Suse Apache Tomcat Apache Software Foundation
7.5
CVSS 3.1 · Vendor: apache
Share

Severity by source

Vendor (apache) PRIMARY
7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
vuln.today AI
7.5 HIGH

Unauthenticated network AJP request (AV:N/PR:N/UI:N) causes thread-pool exhaustion, so availability-only A:H with no C/I impact; base metrics assume AJP enabled per CVSS scoping.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
SUSE
HIGH
qualitative
Red Hat
7.5 HIGH
qualitative

Primary rating from Vendor (apache).

CVSS VectorVendor: apache

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

4
CVSS changed
Sep 23, 2026 - 16:22 NVD
7.5 (HIGH)
Metadata Corrected
Sep 23, 2026 - 12:40 vuln.today
tag: Java added
Analysis Generated
Sep 23, 2026 - 12:16 vuln.today
CVE Published
Sep 23, 2026 - 11:23 cve.org
HIGH

DescriptionCVE.org

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.

AnalysisAI

Denial of service in Apache Tomcat allows an attacker to pin an AJP processing thread through a single AJP request, exhausting the connector's limited thread pool (CWE-770, allocation of resources without limits or throttling). The affected range is broad: 11.0.0-M1 through 11.0.25, 10.1.0-M1 through 10.1.59, 9.0.0.M1 through 9.0.121, plus the end-of-life branches 8.5.0-8.5.100 and 7.0.0-7.0.109, which remain affected even though they are no longer supported. …

Unlock full vulnerability intelligence

  • Risk assessment & exploitation conditions
  • Attack chain visualization
  • Remediation with exact patch versions
  • Threat intelligence from 22 sources
  • Personal watchlist & email alerts
Continue with Google Continue with GitHub

No credit card · 7-day full trial

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
technique details hidden
Delivery
technique details hidden
Exploit
technique details hidden
Execution
technique details hidden
Impact
technique details hidden
Sign in to reveal

Vulnerability AssessmentAI

Exploitation Requires the Apache Tomcat AJP connector (Coyote/AJP, e.g. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment No CVSS vector, EPSS score, KEV listing, or public POC is present in the input, so severity signals must be inferred from the description and CWE-770. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Vendor-released patch: upgrade to Apache Tomcat 11.0.26, 10.1.60, or 9.0.122, which the advisory states fix the issue; the correct target depends on which branch a deployment tracks, and the end-of-life 8.5.x and 7.0.x lines must be migrated to a supported branch because no fixes are being issued for them. … Detailed patch versions, workarounds, and compensating controls in full report.
Sign in to read full assessment

Recommended ActionAI

Within 24 hours, inventory all Apache Tomcat deployments and determine whether the AJP connector is enabled and network-reachable; if AJP is not required, disable it immediately in server.xml. …

Sign in for detailed remediation steps and compensating controls.

Threat intelligence, references, and detailed analysis are available after sign-in.

More in Java

View all
CVE-2012-4681 CRITICAL POC
9.8 Aug 28

Oracle Java SE 7 Update 6 and earlier contains multiple sandbox bypass vulnerabilities via the ClassFinder and forName m
CVE-2015-7450 CRITICAL POC
9.8 Jan 02

Remote code execution in IBM Sterling B2B Integrator, Sterling Integrator, and Tivoli Common Reporting allows unauthenti
CVE-2013-2465 CRITICAL POC
9.8 Jun 18

Java Runtime Environment sandbox bypass via incorrect image channel verification in 2D component allows remote unauthent
CVE-2011-3544 CRITICAL POC
9.8 Oct 19

Oracle Java SE JDK/JRE 7 and 6 Update 27 and earlier allows remote code execution with complete system compromise throug
CVE-2010-1871 HIGH POC
8.8 Aug 05

JBoss Seam 2 in Red Hat JBoss EAP 4.3.0 fails to sanitize JBoss Expression Language inputs, allowing remote attackers to
CVE-2012-1723 CRITICAL POC
9.8 Jun 16

Unspecified vulnerability in the Java Runtime Environment (JRE) component in Oracle Java SE 7 update 4 and earlier, 6 up
CVE-2013-0422 CRITICAL POC
9.8 Jan 10

Multiple vulnerabilities in Oracle Java 7 before Update 11 allow remote attackers to execute arbitrary code by (1) using
CVE-2012-0507 CRITICAL POC
9.8 Jun 07

Unspecified vulnerability in the Java Runtime Environment (JRE) component in Oracle Java SE 7 Update 2 and earlier, 6 Up
CVE-2015-4852 CRITICAL POC
9.8 Nov 18

The WLS Security component in Oracle WebLogic Server 10.3.6.0, 12.1.2.0, 12.1.3.0, and 12.2.1.0 allows remote attackers

CVE-2012-5076 CRITICAL POC
9.8 Oct 16

Unspecified vulnerability in the Java Runtime Environment (JRE) component in Oracle Java SE 7 Update 7 and earlier allow
CVE-2017-3066 CRITICAL POC
9.8 Apr 27

Remote unauthenticated attackers can execute arbitrary code on Adobe ColdFusion servers through Java deserialization fla
CVE-2012-0391 CRITICAL POC
9.8 Jan 08

The ExceptionDelegator component in Apache Struts before 2.2.3.1 interprets parameter values as OGNL expressions during

Same weakness CWE-770 – Allocation of Resources Without Limits or Throttling

View all
CVE-2017-8779 HIGH POC
7.5
CVE-2025-53521 CRITICAL POC
9.3
CVE-2017-5850 HIGH POC
7.5
CVE-2025-26682 HIGH
7.5
CVE-2023-24998 HIGH
7.5
CVE-2025-41770 HIGH
8.7
CVE-2025-26466 MEDIUM
5.9
CVE-2020-37067 CRITICAL POC
9.8

Same technique Denial Of Service

View all
CVE-2015-5119 CRITICAL POC
9.8
CVE-2011-2462 CRITICAL POC
9.8
CVE-2011-0611 HIGH POC
8.8
CVE-2012-1889 HIGH POC
8.8
CVE-2012-0507 CRITICAL POC
9.8
CVE-2014-1761 HIGH POC
7.8
CVE-2015-5122 CRITICAL POC
9.8
CVE-2011-0609 HIGH POC
7.8

Vendor StatusVendor

SUSE

Severity: Important
Product Status
SUSE Linux Enterprise Desktop 15 SP7 SUSE Linux Enterprise Module for Basesystem 15 SP7 Fixed
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS Fixed
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS Fixed
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS Fixed
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS Fixed

Share

EUVD-2026-85230 vulnerability details – vuln.today
Back

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy