CVE-2026-54457

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.

• CWE-552
• CWE-918

• https://github.com/tensorzero/tensorzero/commit/0abbc838bae3394fe7491dad7009670d4e3b6cf8
• https://github.com/tensorzero/tensorzero/releases/tag/2026.6.0
• https://github.com/tensorzero/tensorzero/security/advisories/GHSA-824w-x939-6cmc

Published

Aug 21, 2026

Last Modified

Sep 11, 2026

Status

Awaiting Analysis

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