Vulnerability Description
A vulnerability in keras-team/keras versions <= 3.14.0 allows arbitrary local HDF5 file content disclosure due to improper handling of HDF5 ExternalLinks. The `KerasFileEditor` and `keras.saving.load_weights` functions bypass the `safe_get_h5_group` and `safe_get_h5_dataset` helpers, which are designed to reject ExternalLinks and SoftLinks. This results in automatic dereferencing of links to external HDF5 files, enabling attackers to disclose sensitive data from the victim's local filesystem. Specifically, `KerasFileEditor` extracts attributes and datasets from linked files into its internal structures, while `keras.saving.load_weights` loads weights from linked files into the user's model. This issue can be exploited by providing a malicious `.h5`, `.weights.h5`, or `.keras` file containing ExternalLinks.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/keras-team/keras/commit/23370f16b0ab9a200f7550a34e54a3ceab74b
- https://huntr.com/bounties/876a7226-5428-4a66-9d05-232461120db5
FAQ
What is CVE-2026-9335?
CVE-2026-9335 is a vulnerability with a CVSS score of 6.5 (MEDIUM). A vulnerability in keras-team/keras versions <= 3.14.0 allows arbitrary local HDF5 file content disclosure due to improper handling of HDF5 ExternalLinks. The `KerasFileEditor` and `keras.saving.load_...
How severe is CVE-2026-9335?
CVE-2026-9335 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-9335?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.