CVE-2026-54457
HighCVSS 7.7Exploitation Probability (EPSS)
Low risk33th percentile - higher than 33% of all known CVEs
Summary
TensorZero, an open-source LLMOps platform, prior to version 2026.6.0, contains a vulnerability in the /internal/object_storage endpoint that accepts a caller-supplied storage_path parameter, dynamically overriding the [object_storage] configuration. Selecting the filesystem storage type allows arbitrary files on the gateway filesystem to be read, including credential files. Selecting the s3_compatible storage type causes outbound requests to attacker-chosen endpoints, including internal or cloud-metadata. Exploitation requires access to the gateway, which can be authenticated or unauthenticated depending on deployment. This issue is fixed in version 2026.6.0.
Risk Assessment
An attacker can read sensitive files, including credentials, or perform SSRF attacks on internal resources, potentially leading to confidentiality and integrity breaches.
Recommendation
It is recommended to upgrade TensorZero to version 2026.6.0 or later and restrict access to the /internal/object_storage endpoint.
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Original NVD description (English source)
TensorZero is an open-source LLMOps platform that unifies an LLM gateway, observability, evaluation, optimization, and experimentation. Prior to 2026.6.0, the TensorZero Gateway /internal/object_storage endpoint accepts a caller-supplied JSON storage_path parameter that dynamically overrides the [object_storage] configuration. Selecting the filesystem storage type allows arbitrary files on the gateway filesystem to be read, including credential files. Selecting the s3_compatible storage type causes outbound object-storage requests to attacker-chosen internal or cloud-metadata endpoints. Exploitation requires access to the gateway, which can be authenticated or unauthenticated depending on deployment configuration. This issue is fixed in version 2026.6.0.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS