Vulnerability Description
A vulnerability in keras-team/keras version 3.14.0 allows for arbitrary code execution due to improper handling of deserialization in the `Lambda` layer. Specifically, the `_raise_for_lambda_deserialization()` function fails to enforce the safe-mode guard when `safe_mode` is set to `None`, which is the default value when `from_config()` is called outside of a `SafeModeScope` context. This logic error conflates `None` (unset/default-deny) with `False` (explicitly disabled), bypassing the guard and allowing attacker-controlled `marshal` bytecode to be deserialized. Affected call sites include `keras.layers.deserialize(config)`, `keras.models.clone_model(model)`, and any direct invocation of `Lambda.from_config(config)` without an enclosing `SafeModeScope(True)`. This vulnerability can be exploited to achieve arbitrary OS-level code execution in the context of the server or user process.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Keras | Keras | 3.14.0 |
Related Weaknesses (CWE)
References
- https://huntr.com/bounties/59ceaed1-c8a3-4135-8f94-169ade02823dExploitThird Party Advisory
- https://huntr.com/bounties/59ceaed1-c8a3-4135-8f94-169ade02823dExploitThird Party Advisory
FAQ
What is CVE-2026-12481?
CVE-2026-12481 is a vulnerability with a CVSS score of 9.8 (CRITICAL). A vulnerability in keras-team/keras version 3.14.0 allows for arbitrary code execution due to improper handling of deserialization in the `Lambda` layer. Specifically, the `_raise_for_lambda_deseriali...
How severe is CVE-2026-12481?
CVE-2026-12481 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-12481?
Check the references section above for vendor advisories and patch information. Affected products include: Keras Keras.