CVE-2026-41603

Modified Modified - Updated After Analysis

Improper Certificate Validation in Apache Thrift Before

Publication date: 2026-04-28

Last updated on: 2026-06-30

Assigner: Apache Software Foundation

Description

Improper Validation of Certificate with Host Mismatch vulnerability in Apache Thrift. This issue affects Apache Thrift: before 0.23.0. Users are recommended to upgrade to version 0.23.0, which fixes the issue.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-04-28

Last Modified

2026-06-30

Generated

2026-07-06

AI Q&A

2026-04-28

EPSS Evaluated

2026-07-05

NVD

CVE-2026-41603

EUVD

EUVD-2026-26021

Affected Vendors & Products

Vendor	Product	Version / Range
apache	thrift	to 0.23.0 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-295	The product does not validate, or incorrectly validates, a certificate.
CWE-297	The product communicates with a host that provides a certificate, but the product does not properly ensure that the certificate is actually associated with that host.
CWE-306	The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.

Attack-Flow Graph

Executive Summary

CVE-2026-41603 is a critical vulnerability in Apache Thrift versions prior to 0.23.0, specifically in the Java TSSLTransportFactory component.

The issue involves improper validation of SSL/TLS certificates when there is a hostname mismatch, which means the software does not correctly verify that the certificate presented matches the expected hostname.

This flaw allows an attacker to bypass hostname verification during the SSL/TLS handshake.

Impact Analysis

This vulnerability can lead to serious security risks such as man-in-the-middle (MITM) attacks.

An attacker exploiting this flaw can intercept or alter communications by presenting a certificate with a mismatched hostname that the system incorrectly accepts.

This compromises the confidentiality and integrity of data transmitted over SSL/TLS connections using affected Apache Thrift versions.

Mitigation Strategies

The immediate step to mitigate this vulnerability is to upgrade Apache Thrift to version 0.23.0 or later, as this version contains the fix for the improper validation of SSL/TLS certificates with hostname mismatches.

Compliance Impact

The vulnerability involves improper validation of SSL/TLS certificates with hostname mismatches, which can lead to man-in-the-middle attacks. Such security weaknesses may impact the confidentiality and integrity of data transmissions.

While the provided information does not explicitly mention compliance with standards like GDPR or HIPAA, vulnerabilities that allow interception or tampering of sensitive data could potentially lead to non-compliance with these regulations, which require protection of personal and health information.

Users are advised to upgrade to Apache Thrift version 0.23.0 to mitigate this risk.

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