CVE-2026-17574 The HDF Group CVE debrief

Who should care

Developers and users of HDF5 should be aware of this vulnerability, as it could potentially lead to application crashes or other security issues.

Technical summary

The HDF5 library contains a NULL pointer dereference vulnerability. This occurs when an application attempts to read an attribute with an invalid variable-length datatype type field in a crafted HDF5 file, leading to a potential application crash. The vulnerability is triggered by the invalid datatype field, which causes the application to fail when processing the attribute. This issue can be addressed by reviewing systems and applications that use HDF5, checking for and applying available patches or updates, and implementing additional security measures such as input validation and error handling.

Defensive priority

Medium priority should be given to addressing this vulnerability, as it could lead to application crashes or other security issues.

Recommended defensive actions

• Inventory checks: Review systems and applications that use HDF5 to determine if they are affected.
• Vendor remediation: Check for and apply any available patches or updates from the HDF5 vendor.
• Compensating controls: Implement additional security measures, such as input validation and error handling, to mitigate the risk of this vulnerability.
• Monitoring: Monitor systems and applications for any suspicious activity or crashes that could be related to this vulnerability.
• Exception tracking: Keep track of any exceptions or errors that occur when processing HDF5 files.

Evidence notes

The CVE record was published on 2026-07-27T16:17:04.943Z and was last modified on 2026-07-27T19:17:15.657Z. The NVD entry is currently 5.2 MEDIUM. Limited information is available about the specific details of this vulnerability.

Official resources