PYSEC-2026-3633
Keras: HDF5 links can disclose local file contents
At a glance
- Published
- Updated
- CVE
- CVE-2026-9335
- Aliases
- GHSA-m8wh-29wm-52mv
- CVSS_V3
- CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
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.
Affected packages
| Package | Versions |
|---|---|
| PyPI · keras | introduced 0, fixed 3.12.3, introduced 3.13.0, fixed 3.15.0 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-9335 ADVISORY
- https://github.com/keras-team/keras/pull/22899 WEB
- https://github.com/keras-team/keras/pull/23165 WEB
- https://github.com/keras-team/keras/commit/23370f16b0ab9a200f7550a34e54a3ceab74ba0e WEB
- https://github.com/keras-team/keras/commit/d338a45204bdc787c8b3c4a9b82c1911cd52dedf WEB
- https://github.com/keras-team/keras PACKAGE
- https://github.com/keras-team/keras/releases/tag/v3.12.3 WEB
- https://github.com/keras-team/keras/releases/tag/v3.15.0 WEB
- https://huntr.com/bounties/876a7226-5428-4a66-9d05-232461120db5 WEB
- https://pypi.org/project/keras PACKAGE
- https://github.com/advisories/GHSA-m8wh-29wm-52mv ADVISORY
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — PyPA Advisory Database |