Keras model loading is vulnerable to denial of service through HDF5 shape bombs
Medium5.5CVE-2026-12570 · Published Aug 10, 2026 · updated Sep 10, 2026
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| keras PyPI | < 3.15.0 | 3.15.0 |
Details and references
A vulnerability in keras-team/keras versions < 3.15.0 allows for a denial of service (DoS) attack when loading malicious .keras model files via the keras.models.load_model() function. The H5IOStore.__getitem__ method in keras/src/saving/saving_lib.py does not validate the shape or size of datasets, leading to unbounded memory allocation. A specially crafted .keras file can exploit this flaw to trigger an out-of-memory (OOM) condition, causing the process to be terminated (exit code 137). This issue bypasses the fix for CVE-2026-0897, which only addressed a similar vulnerability in KerasFileEditor. The attack vector includes poisoned models from public repositories or malicious model registries, posing a risk to machine learning pipelines that process untrusted models.
- CVSS 3.0
- CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- Severity from
- GitHub (reviewed advisory)
- Weakness
- CWE-770
- Also known as
- CVE-2026-12570, PYSEC-2026-3856
More Keras advisories
All Keras| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Aug 2 | Keras: HDF5 links can disclose local file contents CVE-2026-9335Medium6.5fixed in 3.12.3, 3.15.0 | Medium6.5 | 3.12.3, 3.15.0 |
| Jul 19 | Keras: TorchModuleWrapper can deserialize unsafe PyTorch pickle data CVE-2026-12484High7.8fixed in 3.12.3, 3.15.0 | High7.8 | 3.12.3, 3.15.0 |
| Jul 14 | Keras: tar extraction permits symlink-based path traversal CVE-2026-12482Low3.1fixed in 3.12.3, 3.15.0 | Low3.1 | 3.12.3, 3.15.0 |
| Jul 3 | Keras: Lambda deserialization can bypass safe mode and execute code CVE-2026-12481High8.8fixed in 3.12.3, 3.15.0 | High8.8 | 3.12.3, 3.15.0 |
| Jul 1 | Keras: HDF5 virtual datasets can disclose local files CVE-2026-12480Medium5.5fixed in 3.12.3, 3.15.0 | Medium5.5 | 3.12.3, 3.15.0 |
| Jun 22 | Keras: DiskIOStore permits path traversal through crafted layer names CVE-2026-12479Medium6.1fixed in 3.12.3, 3.15.0 | Medium6.1 | 3.12.3, 3.15.0 |