TensorZero: Arbitrary file read and SSRF in TensorZero Gateway's internal object storage endpoint

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-54457
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-21 21:17:00 UTC
Updated2026-10-14 19:10:00 UTC
DescriptionTensorZero 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.

Risk And Classification

Primary CVSS: v3.1 7.7 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

EPSS: 0.004020000 probability, percentile 0.327300000 (date 2026-10-14)

Problem Types: CWE-552 | CWE-918 | CWE-552 CWE-552: Files or Directories Accessible to External Parties | CWE-918 CWE-918: Server-Side Request Forgery (SSRF)

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.7HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
3.1CNADECLARED7.7HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Tensorzero Tensorzero affected < 2026.6.0 Not specified

References

ReferenceSourceLinkTags
github.com/tensorzero/tensorzero/security/advisories/GHSA-824w-x939-6cmc [email protected] github.com
github.com/tensorzero/tensorzero/releases/tag/2026.6.0 [email protected] github.com
github.com/tensorzero/tensorzero/commit/0abbc838bae3394fe7491dad7009670d... [email protected] github.com
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