Apache Tomcat up to 9.0.122/10.1.60/11.0.26 sizeof() on a pointer type

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.1$0-$5k2.27+

Summaryinfo

A vulnerability marked as problematic has been reported in Apache Tomcat up to 9.0.122/10.1.60/11.0.26. Affected by this issue is some unknown functionality. This manipulation causes use of sizeof() on a pointer type. This vulnerability is tracked as CVE-2026-93446. The attack is possible to be carried out remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Apache Tomcat up to 9.0.122/10.1.60/11.0.26 and classified as problematic. Affected by this vulnerability is an unknown code. The manipulation with an unknown input leads to a use of sizeof() on a pointer type vulnerability. The CWE definition for the vulnerability is CWE-467. The code calls sizeof() on a malloced pointer type, which always returns the wordsize/8. This can produce an unexpected result if the programmer intended to determine how much memory has been allocated. As an impact it is known to affect availability. The summary by CVE is:

Incomplete cleanup vulnerability in Apache Tomcat could cause TLS 1.3 connections to fail intermittently. This issue affects Apache Tomcat: from 11.0.0-M21 through 11.0.26, from 10.1.25 through 10.1.60, from 9.0.90 through 9.0.122. Users are recommended to upgrade to version 11.0.27, 10.1.61 or 9.0.123, which fix the issue.

The advisory is shared at lists.apache.org. This vulnerability is known as CVE-2026-93446 since 09/18/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/20/2026).

Upgrading to version 9.0.123, 10.1.61 or 11.0.27 eliminates this vulnerability.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Use of sizeof() on a pointer type
CWE: CWE-467
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Tomcat 9.0.123/10.1.61/11.0.27

Timelineinfo

09/18/2026 CVE reserved
10/20/2026 +32 days Advisory disclosed
10/20/2026 +0 days VulDB entry created
10/20/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: apache.org

Advisory: lists.apache.org
Status: Confirmed

CVE: CVE-2026-93446 (🔒)
GCVE (CVE): GCVE-0-2026-93446
GCVE (VulDB): GCVE-100-422797

Entryinfo

Created: 10/20/2026 16:08
Changes: 10/20/2026 16:08 (54)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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