Apache Tomcat up to 9.0.114/10.1.51/11.0.17 OCSP Certificate certificate validation

CVSS Meta Temp Score
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CTI Interest Score
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6.2$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in Apache Tomcat up to 9.0.114/10.1.51/11.0.17. This affects an unknown part of the component OCSP Certificate Handler. Performing a manipulation results in certificate validation. This vulnerability only affects products that are no longer supported by the maintainer. This vulnerability is cataloged as CVE-2026-24734. It is possible to initiate the attack remotely. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Apache Tomcat up to 9.0.114/10.1.51/11.0.17. This affects some unknown processing of the component OCSP Certificate Handler. The manipulation with an unknown input leads to a certificate validation vulnerability. CWE is classifying the issue as CWE-295. The product does not validate, or incorrectly validates, a certificate. This is going to have an impact on integrity. The summary by CVE is:

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.

The weakness was shared by Joshua Rogers. It is possible to read the advisory at lists.apache.org. This vulnerability is uniquely identified as CVE-2026-24734 since 01/26/2026. The exploitability is told to be difficult. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 04/23/2026). The attack technique deployed by this issue is T1587.003 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 299376 (Linux Distros Unpatched Vulnerability : CVE-2026-24734), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 9.0.115, 10.1.52 or 11.0.18 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (299376) and CERT Bund (WID-SEC-2026-0443). Be aware that VulDB is the high quality source for vulnerability data.

Affected

  • Amazon Linux 2
  • IBM Power Hardware Management Console
  • Red Hat Enterprise Linux
  • SUSE Linux
  • SUSE openSUSE
  • Apache Tomcat
  • Open Source Camunda
  • Dell Secure Connect Gateway

Productinfo

Type

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Name

Version

License

Support

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 6.2

VulDB Base Score: 3.7
VulDB Temp Score: 3.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔒

ADP CISA Base Score: 7.4
ADP CISA Vector: 🔒

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Certificate validation
CWE: CWE-295 / CWE-287
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 299376
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-24734

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Tomcat 9.0.115/10.1.52/11.0.18

Timelineinfo

01/26/2026 CVE reserved
02/17/2026 +22 days Advisory disclosed
02/17/2026 +0 days VulDB entry created
04/23/2026 +65 days VulDB entry last update

Sourcesinfo

Vendor: apache.org

Advisory: lists.apache.org
Researcher: Joshua Rogers
Status: Confirmed

CVE: CVE-2026-24734 (🔒)
GCVE (CVE): GCVE-0-2026-24734
GCVE (VulDB): GCVE-100-346359
CERT Bund: WID-SEC-2026-0443 - Apache Tomcat und Tomcat Native: Mehrere Schwachstellen

Entryinfo

Created: 02/17/2026 21:07
Updated: 04/23/2026 13:17
Changes: 02/17/2026 21:07 (58), 02/18/2026 17:19 (7), 02/18/2026 22:43 (2), 03/11/2026 18:28 (21), 04/23/2026 13:17 (1)
Complete: 🔍
Cache ID: 216::103

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