CVE-2026-43869: Libthrift Apache Thrift Has An Improper Vulnerability

HIGH
Advisory Identifier: GHSA-7pwc-h2j2-rjgj
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CVSS 7.3
CWE-297
Published
Advisory Summary

CVE-2026-43869 is a HIGH (CVSS 7.3) apache thrift has an improper vulnerability (CWE-297: Improper Validation of Certificate with Host Mismatch) affecting Libthrift libraries in the Maven ecosystem. The issue involves apache thrift has an improper validation of certificate with host mismatch vulnerability. Remediation is available by upgrading affected packages to version 0.23.0.

CVE-2026-43869 at a Glance

CVE Identifier CVE-2026-43869
GHSA Identifier GHSA-7pwc-h2j2-rjgj
Severity HIGH
CVSS v3.1 Base Score 7.3
CWE Classification CWE-297: Improper Validation of Certificate with Host Mismatch
Affected Product Libthrift
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability Low (A:L)

How to Fix CVE-2026-43869

To remediate this vulnerability, upgrade all affected Libthrift dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

org.apache.thrift:libthrift fixed: 0.23.0 
<dependency>
    <groupId>org.apache.thrift</groupId>
    <artifactId>libthrift</artifactId>
    <version>0.23.0</version>
</dependency>
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree -Dincludes=org.apache.thrift

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-43869, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.apache.thrift

Analyze the terminal output to locate any version of Libthrift in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.23.0), your application is affected.

Note: The mvn dependency:tree -Dincludes=org.apache.thrift command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-297: Improper Validation of Certificate with Host Mismatch, where 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. In Libthrift, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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](https://github.com/apache/thrift/releases/tag/v0.23.0), which fixes the issue.

CVE-2026-43869 Affected Libthrift Versions

1 component(s)
Fixed Versions:
0.23.0
Product / Package Ecosystem Affected Versions Fixed Version
org.apache.thrift:libthrift
maven/org.apache.thrift/libthrift
Maven
< 0.23.0
0.23.0

References

NVD — CVE-2026-43869 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-43869
Security Fix Commit FIX COMMIT
https://github.com/apache/thrift/commit/0919c3d5506151514e283a63e1fe1ce83e2449d8
Libthrift Source Repository REPOSITORY
https://github.com/apache/thrift
Libthrift Release RELEASE
https://github.com/apache/thrift/releases/tag/v0.23.0
lists.apache.org/thread/3hsgl1b69wzq... WEB
https://lists.apache.org/thread/3hsgl1b69wzq3ry39scqbv2dhyl3j52r
Libthrift Security Information SECURITY
http://www.openwall.com/lists/oss-security/2026/05/05/3

Frequently Asked Questions

What is CVE-2026-43869?
CVE-2026-43869 is a security vulnerability in Libthrift involving Apache Thrift has an Improper Validation of Certificate with Host Mismatch Vulnerability under CWE-297: Improper Validation of Certificate with Host Mismatch.
Which Libthrift versions are affected?
Affected versions include releases prior to 0.23.0 across affected packages: org.apache.thrift:libthrift.
What version fixes CVE-2026-43869?
Upgrading to 0.23.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is libthrift affected?
Yes, org.apache.thrift:libthrift is affected in releases prior to 0.23.0. Upgrade your dependency to 0.23.0 or later.
What is the CVSS score of CVE-2026-43869?
CVE-2026-43869 has a CVSS v3.1 base score of 7.3 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.
What CWE is associated with CVE-2026-43869?
CVE-2026-43869 is classified under CWE-297: Improper Validation of Certificate with Host Mismatch (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.).
How can I check Maven dependencies for CVE-2026-43869?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.apache.thrift'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-7pwc-h2j2-rjgj",
  "modified" : "2026-06-02T22:10:43Z",
  "published" : "2026-05-05T09:31:55Z",
  "aliases" : [ "CVE-2026-43869" ],
  "summary" : "Apache Thrift has an Improper Validation of Certificate with Host Mismatch Vulnerability",
  "details" : "Improper Validation of Certificate with Host Mismatch vulnerability in Apache Thrift.\n\nThis issue affects Apache Thrift: before 0.23.0.\n\nUsers are recommended to upgrade to version [0.23.0](https://github.com/apache/thrift/releases/tag/v0.23.0), which fixes the issue.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.thrift:libthrift"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.23.0"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 0.22.0"
    }
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-43869"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apache/thrift/commit/0919c3d5506151514e283a63e1fe1ce83e2449d8"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/apache/thrift"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apache/thrift/releases/tag/v0.23.0"
  }, {
    "type" : "WEB",
    "url" : "https://lists.apache.org/thread/3hsgl1b69wzq3ry39scqbv2dhyl3j52r"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2026/05/05/3"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-297" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-05-08T19:19:58Z",
    "nvd_published_at" : "2026-05-05T08:16:01Z"
  }
}