HDFGroup HDF5 up to 1.14.4-1 heap-based overflow

Summaryinfo

A vulnerability was found in HDFGroup HDF5 up to 1.14.4-1. It has been classified as critical. This affects an unknown part. Performing a manipulation results in heap-based overflow. This vulnerability was named CVE-2026-26200. The attack needs to be approached locally. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as critical, was found in HDFGroup HDF5 up to 1.14.4-1. This affects an unknown code block. The manipulation with an unknown input leads to a heap-based overflow vulnerability. CWE is classifying the issue as CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

HDF5 is software for managing data. Prior to version 1.14.4-2, an attacker who can control an `h5` file parsed by HDF5 can trigger a write-based heap buffer overflow condition. This can lead to a denial-of-service condition, and potentially further issues such as remote code execution depending on the practical exploitability of the heap overflow against modern operating systems. Real-world exploitability of this issue in terms of remote-code execution is currently unknown. Version 1.14.4-2 fixes the issue.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-26200 since 02/11/2026. The exploitability is told to be easy. An attack has to be approached locally. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 299645 (Linux Distros Unpatched Vulnerability : CVE-2026-26200), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.14.4-2 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (299645). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Database Software

Vendor

• HDFGroup

Name

• HDF5

Version

• 1.14.4-1

License

• free

Website

• Product: https://github.com/HDFGroup/hdf5/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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