CVE-2026-0897: Denial of Service in Keras via Excessive Memory Allocation in HDF5 Metadata

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-01-15 · updated 2026-07-15
Weakness: CWE-770

Description

Allocation of Resources Without Limits or Throttling in the HDF5 weight loading component in Google Keras 3.0.0 through 3.13.0 on all platforms allows a remote attacker to cause a Denial of Service (DoS) through memory exhaustion and a crash of the Python interpreter via a crafted .keras archive containing a valid model.weights.h5 file whose dataset declares an extremely large shape.

Affected products

keras-team/keras: from 3.0.0 through 3.13.0

References

https://github.com/keras-team/keras/pull/21880
https://access.redhat.com/errata/RHSA-2026:3713
https://access.redhat.com/errata/RHSA-2026:3782
https://access.redhat.com/errata/RHSA-2026:4271
https://access.redhat.com/security/cve/CVE-2026-0897
https://bugzilla.redhat.com/show_bug.cgi?id=2430027
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-0897.json

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