CVE-2026-43870
Undergoing Analysis Undergoing Analysis - In Progress
Path Traversal in Apache Thrift

Publication date: 2026-05-05

Last updated on: 2026-05-06

Assigner: Apache Software Foundation

Description
Origin Validation Error, Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'), Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting'), Uncontrolled Resource Consumption 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.
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Meta Information
Published
2026-05-05
Last Modified
2026-05-06
Generated
2026-06-16
AI Q&A
2026-05-05
EPSS Evaluated
2026-06-15
NVD
CVE-2026-43870
EUVD
EUVD-2026-27245
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
apache thrift to 0.23.0 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-113 The product receives data from an HTTP agent/component (e.g., web server, proxy, browser, etc.), but it does not neutralize or incorrectly neutralizes CR and LF characters before the data is included in outgoing HTTP headers.
CWE-346 The product does not properly verify that the source of data or communication is valid.
CWE-400 The product does not properly control the allocation and maintenance of a limited resource.
CWE-22 The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.
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Executive Summary

CVE-2026-43870 affects Apache Thrift versions before 0.23.0 and involves multiple security issues in the Node.js web_server.js implementation.

  • Origin validation error
  • Path traversal flaw allowing access to restricted directories
  • HTTP request/response splitting due to improper neutralization of CRLF sequences in HTTP headers
  • Uncontrolled resource consumption vulnerability

The recommended fix is to upgrade Apache Thrift to version 0.23.0 or later.

Impact Analysis

This vulnerability can lead to unauthorized access to restricted directories, manipulation of HTTP headers causing request/response splitting, and excessive resource consumption.

Such impacts may result in security breaches, data exposure, denial of service, or other malicious activities against systems using vulnerable Apache Thrift versions.

Mitigation Strategies

The immediate step to mitigate this vulnerability is to upgrade Apache Thrift to version 0.23.0 or later.

Compliance Impact

The provided information does not specify how the CVE-2026-43870 vulnerability affects compliance with common standards and regulations such as GDPR or HIPAA.

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