CVE-2026-24734
Improper Input Validation in Apache Tomcat Native OCSP Handling
Publication date: 2026-02-17
Last updated on: 2026-03-11
Assigner: Apache Software Foundation
Description
Description
CVSS Scores
EPSS Scores
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| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| apache | tomcat | 10.1.0 |
| apache | tomcat | 10.1.0 |
| apache | tomcat | 10.1.0 |
| apache | tomcat | 10.1.0 |
| apache | tomcat | 10.1.0 |
| apache | tomcat | 10.1.0 |
| apache | tomcat | 10.1.0 |
| apache | tomcat | 10.1.0 |
| apache | tomcat | 10.1.0 |
| apache | tomcat | 10.1.0 |
| apache | tomcat | 10.1.0 |
| apache | tomcat | 10.1.0 |
| apache | tomcat | 10.1.0 |
| apache | tomcat | 10.1.0 |
| apache | tomcat | 10.1.0 |
| apache | tomcat | 10.1.0 |
| apache | tomcat | 10.1.0 |
| apache | tomcat | 11.0.0 |
| apache | tomcat | 11.0.0 |
| apache | tomcat | 11.0.0 |
| apache | tomcat | 11.0.0 |
| apache | tomcat | 11.0.0 |
| apache | tomcat | 11.0.0 |
| apache | tomcat | 11.0.0 |
| apache | tomcat | 11.0.0 |
| apache | tomcat | 11.0.0 |
| apache | tomcat | 11.0.0 |
| apache | tomcat | 10.1.0 |
| apache | tomcat | 10.1.0 |
| apache | tomcat | 10.1.0 |
| apache | tomcat | 11.0.0 |
| apache | tomcat | 11.0.0 |
| apache | tomcat | 11.0.0 |
| apache | tomcat | 11.0.0 |
| apache | tomcat | 11.0.0 |
| apache | tomcat | 11.0.0 |
| apache | tomcat | 11.0.0 |
| apache | tomcat | 11.0.0 |
| apache | tomcat | 11.0.0 |
| apache | tomcat | 11.0.0 |
| apache | tomcat | 11.0.0 |
| apache | tomcat | 11.0.0 |
| apache | tomcat | 11.0.0 |
| apache | tomcat | 11.0.0 |
| apache | tomcat | 11.0.0 |
| apache | tomcat | 11.0.0 |
| apache | tomcat | From 10.1.1 (inc) to 10.1.52 (exc) |
| apache | tomcat | From 11.0.1 (inc) to 11.0.18 (exc) |
| apache | tomcat | From 9.0.83 (inc) to 9.0.115 (exc) |
| apache | tomcat_native | From 1.3.0 (inc) to 1.3.5 (exc) |
| apache | tomcat_native | From 2.0.0 (inc) to 2.0.12 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-20 | The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is an Improper Input Validation issue in Apache Tomcat Native and Apache Tomcat when using an OCSP responder. Specifically, Tomcat Native and Tomcat's FFM port of the Tomcat Native code did not complete verification or freshness checks on the OCSP response. This flaw could allow an attacker to bypass certificate revocation checks.
How can this vulnerability impact me? :
Because the verification or freshness checks on OCSP responses are not properly completed, an attacker could bypass certificate revocation. This means that revoked certificates might still be accepted as valid, potentially allowing unauthorized or malicious entities to impersonate trusted parties or intercept secure communications.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
To mitigate this vulnerability, upgrade affected Apache Tomcat Native versions to 1.3.5 or later or 2.0.12 or later.
For Apache Tomcat, upgrade to versions 11.0.18 or later, 10.1.52 or later, or 9.0.115 or later.