TensorZero: Arbitrary file read and SSRF in TensorZero Gateway's internal object storage endpoint (CVE-2026-54457) | HOL Guard CVE

High severityCVE-2026-54457GHSA-824W-X939-6CMC

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

Answer in brief

CVE-2026-54457 records a High severity vulnerability in TensorZero: Arbitrary file read and SSRF in TensorZero Gateway's internal object storage endpoint. The current sources do not mark it as known exploited. The current feed maps tensorzero/tensorzero (generic), tensorzero (pip). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 21, 2026Updated Aug 21, 2026Source checked Aug 21, 2026First seen by HOL Jul 15, 2026Material review Aug 21, 2026

Upstream Advisory

Key facts

Risk: High
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps tensorzero/tensorzero (generic), tensorzero (pip). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
tensorzero/tensorzerogeneric	< 2026.6.0	Not reported
tensorzeropip	<2026.6.0	2026.6.0

Recommended response

Check inventory. Check lockfiles and deployed manifests for tensorzero/tensorzero, tensorzero.
Review the reported fix. Update tensorzero to 2026.6.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 21, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 21, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Jul 15, 2026

Sources and claim methodology

Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.