# CVE-2026-43869: Apache Thrift improper certificate validation in TSSLTransportFactory

Source: https://junglewise.ai/threats/cve-2026-43869-apache-thrift-improper-certificate-validation-in  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-05-05. Updated: 2026-06-30  
License: CC BY 4.0 with a link back

CVE-2026-43869 · Severity: high · CVSS 7.3 · Published 2026-05-05

Apache Thrift is a software framework used for scalable cross-language services development. A security flaw in its Java library fails to properly verify that a server's security certificate matches its actual domain name. This could allow an attacker to intercept or tamper with encrypted communications between services, potentially leading to the exposure of sensitive data or unauthorized modification of service traffic.

Technologies: [Apache Thrift](https://junglewise.ai/threats/technologies/thrift), [org.apache.thrift:libthrift (Maven)](https://junglewise.ai/threats/technologies/org-apache-thrift-libthrift), [Red Hat Multicluster Global Hub](https://junglewise.ai/threats/technologies/multicluster-global-hub). Vendors: [Apache](https://junglewise.ai/threats/vendors/apache), [Maven](https://junglewise.ai/threats/vendors/maven), [Red Hat](https://junglewise.ai/threats/vendors/red-hat).

## Quick answers

**Is CVE-2026-43869 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-43869 being exploited in the wild.

**How severe is CVE-2026-43869?** High severity, with a CVSS score of 7.3, published 5 May 2026.

**Which products and versions are affected?** Apache Thrift < 0.23.0; org.apache.thrift:libthrift (Maven) <= 0.22.0, ECOSYSTEM:introduced=0,fixed=0.23.0; Red Hat Multicluster Global Hub 1.4.5, 1.5.4, 1.6.2, 1.7.1.

**Is there a fix for CVE-2026-43869?** Yes. org.apache.thrift:libthrift (Maven): upgrade to 0.23.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-43869 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-43869?** Check whether you run Apache Thrift, org.apache.thrift:libthrift (Maven) or Red Hat Multicluster Global Hub at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- org.apache.thrift:libthrift (Maven): upgrade to 0.23.0 or later

  ```sh
  # set org.apache.thrift:libthrift to 0.23.0 in your pom.xml or build.gradle
  ```


## Technical details

A vulnerability exists in Apache Thrift's Java implementation (specifically within TSSLTransportFactory.java) due to improper validation of certificates with host mismatches (CWE-297). When establishing SSL/TLS connections, the library fails to adequately verify that the hostname of the server matches the identity presented in the certificate. A remote, unauthenticated attacker positioned on the network could exploit this to perform man-in-the-middle (MitM) attacks, intercepting or altering encrypted traffic. This issue affects Apache Thrift versions prior to 0.23.0. Users are advised to upgrade to version 0.23.0 or apply relevant vendor patches for downstream products like Red Hat Multicluster Global Hub.

## Affected products

- Apache Thrift before 0.23.0
- Red Hat Multicluster Global Hub 1.4.5, 1.5.4, 1.6.2, 1.7.1
- Red Hat Advanced Cluster Management for Kubernetes 2.13, 2.15, 2.16

## Identifiers

- CVE-2026-43869
- GHSA-7pwc-h2j2-rjgj

## Timeline

- 2026-05-04: disclosed: Initial disclosure on oss-security mailing list
- 2026-05-05: advisory: NVD publication date
- 2026-05-28: patched: Red Hat released security updates for Multicluster Global Hub 1.5.4

## References

- [https://lists.apache.org/thread/3hsgl1b69wzq3ry39scqbv2dhyl3j52r](https://lists.apache.org/thread/3hsgl1b69wzq3ry39scqbv2dhyl3j52r)
- [http://www.openwall.com/lists/oss-security/2026/05/05/3](http://www.openwall.com/lists/oss-security/2026/05/05/3)
- [https://access.redhat.com/errata/RHSA-2026:21769](https://access.redhat.com/errata/RHSA-2026:21769)
- [https://access.redhat.com/errata/RHSA-2026:22347](https://access.redhat.com/errata/RHSA-2026:22347)
- [https://access.redhat.com/errata/RHSA-2026:22423](https://access.redhat.com/errata/RHSA-2026:22423)
- [https://access.redhat.com/errata/RHSA-2026:23345](https://access.redhat.com/errata/RHSA-2026:23345)
- [https://access.redhat.com/errata/RHSA-2026:24503](https://access.redhat.com/errata/RHSA-2026:24503)

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- [Apache Thrift Ruby bindings exception handling vulnerability](https://junglewise.ai/threats/cve-2026-96277-uncaught-exception-improper-handling-of-exceptional-conditions)