CVE-2026-54457Network attack vector

File read and SSRF via storage override

Published Aug 21, 2026 · Updated Aug 25, 2026

Arbitrary file read and SSRF in TensorZero before 2026.6.0 allow remote attackers to access files and internal services via the gateway. The /internal/object_storage handler trusts the JSON storage_path override, allowing filesystem paths or S3-compatible endpoints to replace configured storage. The gateway must be reachable by untrusted callers; authentication limits exploitation to remote authenticated users, while the default disabled setting permits unauthenticated access.

CVSS severity7.7
High
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Arbitrary file read and SSRF in TensorZero before 2026.6.0 allow remote attackers to access files and internal services via the gateway. The /internal/object_storage handler trusts the JSON storage_path override, allowing filesystem paths or S3-compatible endpoints to replace configured storage. The gateway must be reachable by untrusted callers; authentication limits exploitation to remote authenticated users, while the default disabled setting permits unauthenticated access.

The record

CVE
CVE-2026-54457
Published
Aug 21, 2026
Updated
Aug 25, 2026
Vendor
TensorZero
Product
TensorZero
Classifications
CWE-918, CWE-552, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2026.6.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

TensorZero · TensorZeroversion=< 2026.6.0

Published CVSS scores

7.7GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
CWE-552Files or Directories Accessible to External Parties
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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