Skip to main content

Tomcat CVE-2026-24734

HIGH
Improper Input Validation (CWE-20)
2026-02-17 security@apache.org GHSA-mgp5-rv84-w37q
Authentication Bypass Apache Tomcat Tomcat Native
7.5
CVSS 3.1 · NVD
View

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Configure Tomcat with OCSP responder
  2. Exploit
    Send request with revoked certificate
  3. Execution
    OCSP response validation skipped
  4. Impact
    Bypassed certificate revocation check

Vulnerability Assessment

Weakness
CWE
CWE-20
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V2 - Validation and Business Logic Input validation, allowlisting
Exploitation Conditions

Apache Tomcat Native 1.3.0-1.3.4 or 2.0.0-2.0.11 (or Apache Tomcat 9.0.83-9.0.114, 10.1.0-10.1.51, 11.0.0-11.0.17) configured with OCSP responder enabled for certificate validation.
Impact

CVSS 7.5 (HIGH). Attack vector: Network. Complexity: Low. Privileges required: None. User interaction: None.
Exploit ScenarioDerived

An attacker could exploit this vulnerability to certificate revocation to be bypassed.
This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
Patch available 0.1% exploitation probability (EPSS)

Get an e-mail when this CVE is exploited, patched or re-scored. Free account.

Alert me

AnalysisAIv1 – Mar 12, 2026

Improper Input Validation vulnerability in Apache Tomcat Native, Apache Tomcat. [CVSS 7.5 HIGH]

RemediationAI

Monitor vendor advisories for a patch. Restrict network access to the affected service where possible.

Affected Packages

maven org.apache.tomcat.embed:tomcat-embed-core fix: 9.0.115, 10.1.52, 11.0.18
maven org.apache.tomcat:tomcat-coyote fix: 9.0.115, 10.1.52, 11.0.18

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 2 packages in maven

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Sign in to check
Technical ContextAI · show details

Classified as CWE-20 (Improper Input Validation). Affects Tomcat. Improper Input Validation vulnerability in Apache Tomcat Native, Apache Tomcat.

When using an OCSP responder, Tomcat Native (and Tomcat's FFM port of the Tomcat Native code) did not complete verification or freshness checks on the OCSP response which could allow certificate revocation to be bypassed.

This issue affects Apache Tomcat Native:  from 1.3.0 through 1.3.4, from 2.0.0 through 2.0.11; Apache Tomcat: from 11.0.0-M1 through 11.0.17, from 10.1.0-M7 through 10.1.51, from 9.0.83 through 9.

Know when Tomcat gets its next vulnerability

  • Watch products and get an email when something new is published
  • Check this CVE against your own stack and servers
  • Exploit and PoC references, threat intelligence from 22 sources
Continue with Google Continue with GitHub

No credit card · 7-day full trial

Severity by source

NVD PRIMARY 7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
SUSE 7.4 HIGH
AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Red Hat 7.4 HIGH

Primary rating from NVD.

CVSS VectorNVD

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

Lifecycle Timeline

2
Patch released
Mar 31, 2026 - 21:13 nvd
Patch available
CVE Published
Feb 17, 2026 - 19:21 nvd
HIGH 7.5

DescriptionNVD

Improper Input Validation vulnerability in Apache Tomcat Native, Apache Tomcat.

When using an OCSP responder, Tomcat Native (and Tomcat's FFM port of the Tomcat Native code) did not complete verification or freshness checks on the OCSP response which could allow certificate revocation to be bypassed.

This issue affects Apache Tomcat Native:  from 1.3.0 through 1.3.4, from 2.0.0 through 2.0.11; Apache Tomcat: from 11.0.0-M1 through 11.0.17, from 10.1.0-M7 through 10.1.51, from 9.0.83 through 9.0.114.

The following versions were EOL at the time the CVE was created but are known to be affected: from 1.1.23 through 1.1.34, from 1.2.0 through 1.2.39. Older EOL versions are not affected.

Apache Tomcat Native users are recommended to upgrade to versions 1.3.5 or later or 2.0.12 or later, which fix the issue.

Apache Tomcat users are recommended to upgrade to versions 11.0.18 or later, 10.1.52 or later or 9.0.115 or later which fix the issue.

Blast Radius

ecosystem impact
† from your stack dependencies † transitive graph · vuln.today resolves 4-path depth
  • 2 maven packages depend on org.apache.tomcat.embed:tomcat-embed-core (2 direct, 0 indirect)
  • 3 maven packages depend on org.apache.tomcat:tomcat-coyote (3 direct, 0 indirect)

Ecosystem-wide dependent count for version 11.0.0-M1 and other introduced versions.

Executive ViewAI

Why It Matters

A high-severity input validation vulnerability in Apache Tomcat Native affects organizations running vulnerable Tomcat versions, potentially allowing attackers to exploit improper input handling. Since no patch is currently available, immediate interim mitigation measures are required to reduce organizational risk while waiting for vendor remediation.

Business Impact: High
Compensating Controls

Implement Web Application Firewall (WAF) rules to validate and sanitize input; restrict network access to Tomcat services using firewall rules and network segmentation; disable Apache Tomcat Native if not operationally required; enable detailed logging and monitoring for suspicious input patterns; apply vendor security updates immediately upon availability; consider running Tomcat in a containerized/isolated environment with minimal privileges.

Threat Intelligence Overview

EPSS Score
0.1%
Top 73% exploitable
Data Quality
5 sources
Confidence: Medium
NVD CVE.org EPSS Vendor VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC No
EPSS 0.1%
Patch available Yes
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact
High

Priority Score

38
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +38
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication Bypass CRITICAL

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

Affected Products (CPE)NVD

cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:10.1.0:milestone1:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:10.1.0:milestone10:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:10.1.0:milestone11:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:10.1.0:milestone12:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:10.1.0:milestone13:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:10.1.0:milestone14:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:10.1.0:milestone15:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:10.1.0:milestone16:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:10.1.0:milestone17:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:10.1.0:milestone18:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:10.1.0:milestone19:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:10.1.0:milestone2:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:10.1.0:milestone20:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:10.1.0:milestone3:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:10.1.0:milestone4:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:10.1.0:milestone5:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:10.1.0:milestone6:*:*:*:*:*:*
+ 31 more

More in Tomcat

View all
CVE-2017-12617 HIGH POC
8.1 Oct 04

When running Apache Tomcat versions 9.0.0.M1 to 9.0.0, 8.5.0 to 8.5.22, 8.0.0.RC1 to 8.0.46 and 7.0.0 to 7.0.81 with HTT
CVE-2020-1938 CRITICAL POC
9.8 Feb 24

When using the Apache JServ Protocol (AJP), care must be taken when trusting incoming connections to Apache Tomcat. Rate
CVE-2023-47246 CRITICAL POC
9.8 Nov 10

In SysAid On-Premise before 23.3.36, a path traversal vulnerability leads to code execution after an attacker writes a f
CVE-2016-8735 CRITICAL POC
9.8 Apr 06

Remote code execution is possible with Apache Tomcat before 6.0.48, 7.x before 7.0.73, 8.x before 8.0.39, 8.5.x before 8
CVE-2017-12615 HIGH POC
8.1 Sep 19

When running Apache Tomcat 7.0.0 to 7.0.79 on Windows with HTTP PUTs enabled (e.g. Rated high severity (CVSS 8.1), this

CVE-2023-44487 HIGH POC
7.5 Oct 10

Denial of service against HTTP/2 server implementations allows remote unauthenticated attackers to exhaust server resour
CVE-2014-0050 HIGH POC
7.5 Apr 01

MultipartStream.java in Apache Commons FileUpload before 1.3.1, as used in Apache Tomcat, JBoss Web, and other products,
CVE-2020-13935 HIGH POC
7.5 Jul 14

The payload length in a WebSocket frame was not correctly validated in Apache Tomcat 10.0.0-M1 to 10.0.0-M6, 9.0.0.M1 to
CVE-2018-11784 MEDIUM POC
4.3 Oct 04

When the default servlet in Apache Tomcat versions 9.0.0.M1 to 9.0.11, 8.5.0 to 8.5.33 and 7.0.23 to 7.0.90 returned a r
CVE-2022-29885 HIGH POC
7.5 May 12

The documentation of Apache Tomcat 10.1.0-M1 to 10.1.0-M14, 10.0.0-M1 to 10.0.20, 9.0.13 to 9.0.62 and 8.5.38 to 8.5.78

CVE-2017-12616 HIGH
7.5 Sep 19

When using a VirtualDirContext with Apache Tomcat 7.0.0 to 7.0.80 it was possible to bypass security constraints and/or

CVE-2020-9484 HIGH POC
7.0 May 20

When using Apache Tomcat versions 10.0.0-M1 to 10.0.0-M4, 9.0.0.M1 to 9.0.34, 8.5.0 to 8.5.54 and 7.0.0 to 7.0.103 if a)

Same weakness CWE-20 – Improper Input Validation

View all
CVE-2021-44228 CRITICAL POC
10.0
CVE-2024-3400 CRITICAL POC
10.0
CVE-2022-47966 CRITICAL POC
9.8
CVE-2023-22515 CRITICAL POC
9.8
CVE-2009-0927 HIGH POC
8.8
CVE-2017-9791 CRITICAL POC
9.8
CVE-2017-15944 CRITICAL POC
9.8
CVE-2019-0604 CRITICAL POC
9.8

Same technique Authentication Bypass

View all
CVE-2015-3306 CRITICAL POC
10.0
CVE-2012-4681 CRITICAL POC
9.8
CVE-2013-2465 CRITICAL POC
9.8
CVE-2011-3544 CRITICAL POC
9.8
CVE-2022-40684 CRITICAL POC
9.8
CVE-2025-61882 CRITICAL POC
9.8
CVE-2024-0012 CRITICAL POC
9.3

Vendor StatusVendor

SUSE

Severity: High
Product Status
Container suse/manager/5.0/x86_64/server:latest Affected
Container suse/sl-micro/6.0/baremetal-os-container:2.1.3-6.51 Container suse/sl-micro/6.0/base-os-container:2.1.3-7.16 Container suse/sl-micro/6.0/toolbox:13.2-9.10 Image SL-Micro Image SLE-Micro Image SLE-Micro-Azure Image SLE-Micro-BYOS Image SLE-Micro-BYOS-Azure Image SLE-Micro-BYOS-EC2 Image SLE-Micro-BYOS-GCE Image SLE-Micro-EC2 Image SLE-Micro-GCE Affected
Container suse/sl-micro/6.1/baremetal-os-container:2.2.1-7.46 Container suse/sl-micro/6.1/base-os-container:2.2.1-5.68 Image SL-Micro-Azure Image SL-Micro-BYOS-Azure Image SL-Micro-BYOS-EC2 Image SL-Micro-BYOS-GCE Image SL-Micro-EC2 Image SUSE-Multi-Linux-Manager-Proxy-BYOS-Azure Image SUSE-Multi-Linux-Manager-Proxy-BYOS-EC2 Image SUSE-Multi-Linux-Manager-Proxy-BYOS-GCE Image SUSE-Multi-Linux-Manager-Server-Azure-llc Image SUSE-Multi-Linux-Manager-Server-Azure-ltd Image SUSE-Multi-Linux-Manager-Server-BYOS-Azure Image SUSE-Multi-Linux-Manager-Server-BYOS-EC2 Image SUSE-Multi-Linux-Manager-Server-BYOS-GCE Image SUSE-Multi-Linux-Manager-Server-EC2-llc Image SUSE-Multi-Linux-Manager-Server-EC2-ltd Affected
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS Fixed
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS Fixed

References

Advisories & patches
ADVISORY https://access.redhat.com/errata/RHSA-2026:5611 ADVISORY https://access.redhat.com/errata/RHSA-2026:5612 ADVISORY https://lists.apache.org/thread/292dlmx3fz1888v6v16221kpozq56gml ADVISORY https://vuldb.com/vuln/346359 ADVISORY https://www.suse.com/support/update/SUSE-SU-2026:0877/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2026:0890/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2026:0932/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2026:20926/ REF https://access.redhat.com/errata/RHSA-2026:19054 REF https://access.redhat.com/errata/RHSA-2026:26323 REF https://access.redhat.com/errata/RHSA-2026:36790 REF https://access.redhat.com/errata/RHSA-2026:6569 REF https://access.redhat.com/errata/RHSA-2026:8334 REF https://access.redhat.com/security/cve/CVE-2026-24734 REF https://bugzilla.redhat.com/show_bug.cgi?id=2440426 REF https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-24734.json

Search Externally

GitHub PoC Exploit-DB PacketStorm Snyk Rapid7 Nuclei Templates Trickest PoC
Back

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