CVE-2026-18948: TensorFlow — CRITICAL

A flaw was found in Feast. The system improperly deserializes user-defined functions (UDFs) stored in its registry, which are serialized using the 'dill' library. This allows a remote attacker to store a malicious UDF, leading to unauthenticated arbitrary code execution on the feature server in...

Full CISO analysis pending enrichment.

What systems are affected?

Package	Ecosystem	Vulnerable Range	Patched
TensorFlow	pip	—	No patch
196.9K OpenSSF 7.2 3.7K dependents Pushed yesterday 4% patched ~1372d to patch Full package profile →
TensorFlow	pip	—	No patch
196.9K OpenSSF 7.2 3.7K dependents Pushed yesterday 4% patched ~1372d to patch Full package profile →
TensorFlow	pip	—	No patch
196.9K OpenSSF 7.2 3.7K dependents Pushed yesterday 4% patched ~1372d to patch Full package profile →
TensorFlow	pip	—	No patch
196.9K OpenSSF 7.2 3.7K dependents Pushed yesterday 4% patched ~1372d to patch Full package profile →
rhoai/odh-feature-server-rhel9	—	—	No patch
rhoai/odh-pipeline-runtime-datascience-cpu-py312-rhel9	—	—	No patch
rhoai/odh-pipeline-runtime-pytorch-cuda-py312-rhel9	—	—	No patch
rhoai/odh-pipeline-runtime-pytorch-llmcompressor-cuda-py312-rhel9	—	—	No patch
rhoai/odh-pipeline-runtime-pytorch-rocm-py312-rhel9	—	—	No patch
rhoai/odh-workbench-codeserver-datascience-cpu-py312-rhel9	—	—	No patch
rhoai/odh-workbench-jupyter-datascience-cpu-py312-rhel9	—	—	No patch
rhoai/odh-workbench-jupyter-pytorch-cuda-py312-rhel9	—	—	No patch
rhoai/odh-workbench-jupyter-pytorch-llmcompressor-cuda-py312-rhel9	—	—	No patch
rhoai/odh-workbench-jupyter-pytorch-rocm-py312-rhel9	—	—	No patch

How severe is it?

CVSS 3.1

9.9 / 10

EPSS

N/A

Exploitation Status

No known exploitation

Sophistication

N/A

What is the attack surface?

AV Network

AC Low

PR Low

UI None

S Changed

C High

I High

A High

What should I do?

No patch available

Monitor for updates. Consider compensating controls or temporary mitigations.

Which compliance frameworks are affected?

Compliance analysis pending. Sign in for full compliance mapping when available.

Frequently Asked Questions

What is CVE-2026-18948?

A flaw was found in Feast. The system improperly deserializes user-defined functions (UDFs) stored in its registry, which are serialized using the 'dill' library. This allows a remote attacker to store a malicious UDF, leading to unauthenticated arbitrary code execution on the feature server in default configurations. An authenticated attacker can also achieve arbitrary code execution on the registry server by bypassing authorization checks during deserialization. This vulnerability can result in cross-tenant data access and lateral movement within the system.

Is CVE-2026-18948 actively exploited?

No confirmed active exploitation of CVE-2026-18948 has been reported, but organizations should still patch proactively.

How to fix CVE-2026-18948?

No patch is currently available. Monitor vendor advisories for updates.

What is the CVSS score for CVE-2026-18948?

CVE-2026-18948 has a CVSS v3.1 base score of 9.9 (CRITICAL).

What are the technical details?

Original Advisory

A flaw was found in Feast. The system improperly deserializes user-defined functions (UDFs) stored in its registry, which are serialized using the 'dill' library. This allows a remote attacker to store a malicious UDF, leading to unauthenticated arbitrary code execution on the feature server in default configurations. An authenticated attacker can also achieve arbitrary code execution on the registry server by bypassing authorization checks during deserialization. This vulnerability can result in cross-tenant data access and lateral movement within the system.