Skip to main content

Apache Tomcat EUVDEUVD-2026-85231

| CVE-2026-78437 HIGH
Incomplete Cleanup (CWE-459)
2026-09-23 apache GHSA-hvg5-8g86-xm44
Apache Java Red Hat Tomcat Suse Apache Tomcat Apache Software Foundation
7.3
CVSS 3.1 · Vendor: apache
Share

Severity by source

Vendor (apache) PRIMARY
7.3 LOW
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
vuln.today AI
5.6 MEDIUM

Network-reachable and unauthenticated, but the vendor-stated timing dependence makes exploitation a race (AC:H); impacts remain low and limited to a single cross-user request.

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

Primary rating from Vendor (apache).

CVSS VectorVendor: apache

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

Lifecycle Timeline

7
Analysis Updated
Sep 23, 2026 - 17:29 vuln.today
v2 (cvss_changed)
Re-analysis Queued
Sep 23, 2026 - 17:22 vuln.today
cvss_changed
CVSS changed
Sep 23, 2026 - 17:22 NVD
7.3 (HIGH)
Metadata Corrected
Sep 23, 2026 - 12:40 vuln.today
tag: Java added
Metadata Corrected
Sep 23, 2026 - 12:40 vuln.today
tag: Information Disclosure removed
Analysis Generated
Sep 23, 2026 - 12:15 vuln.today
CVE Published
Sep 23, 2026 - 11:26 cve.org
LOW

DescriptionCVE.org

Incomplete cleanup vulnerability in Apache Tomcat allows a malformed request to potentially (depends on timing) cause one request from another user to fail.

This issue affects Apache Tomcat: from 11.0.19 through 11.0.25, from 10.1.53 through 10.1.59, from 9.0.116 through 9.0.121.

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

AnalysisAI

Apache Tomcat 11.0.19 through 11.0.25, 10.1.53 through 10.1.59, and 9.0.116 through 9.0.121 can cause an unrelated user's request to fail when a malformed request triggers incomplete cleanup of request-processing state on a reachable HTTP connector. No authentication or user interaction is required, but the effect is fundamentally gated by a race window - the advisory itself states the failure occurs only 'depending on timing' - so it is non-deterministic and cannot be reliably triggered on demand, and the realistic worst case is intermittent failure of another user's individual request rather than sustained denial of service, data disclosure, or code execution. …

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 a reachable Apache Tomcat HTTP connector on an affected maintenance build (11.0.19-11.0.25, 10.1.53-10.1.59, or 9.0.116-9.0.121) processing concurrent requests from multiple users. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L, 7.3) presents this as a network-reachable, unauthenticated, low-complexity flaw with low impact across all three of confidentiality, integrity, and availability. … 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 Upgrade to a fixed build: Apache Tomcat 11.0.26, 10.1.60, or 9.0.122, matching whichever major line you operate, per the vendor advisory at https://lists.apache.org/thread/qkmsos3s8chn5053qr466rzwv6sk5gjg (mirrored at https://nvd.nist.gov/vuln/detail/CVE-2026-78437). … 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 to identify versions 9.0.116 through 9.0.121, 10.1.53 through 10.1.59, and 11.0.19 through 11.0.25, and restrict network access to the HTTP connector to trusted sources where possible. …

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-459 – Incomplete Cleanup

View all
CVE-2017-17090 HIGH POC
7.5
CVE-2025-31650 HIGH POC
7.5
CVE-2024-28265 CRITICAL POC
9.1
CVE-2023-36468 HIGH POC
8.8
CVE-2018-18924 HIGH POC
8.8
CVE-2018-18281 HIGH POC
7.8
CVE-2025-60730 HIGH POC
7.6
CVE-2025-64775 HIGH POC
7.5

Vendor StatusVendor

SUSE

Severity: Low
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-2026-85231 vulnerability details – vuln.today
Back

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