Vulnerability-Lookup

CVE-2026-54457 (GCVE-0-2026-54457)

Vulnerability from cvelistv5 – Published: 2026-08-21 20:34 – Updated: 2026-08-25 13:38

Title

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

Summary

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.

Severity

7.7 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-25 13:38 UTC

CWE

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

Assigner

GitHub_M mitre root

References

3 references

URL	Tags
https://github.com/tensorzero/tensorzero/security…	x_refsource_CONFIRM
https://github.com/tensorzero/tensorzero/commit/0…	x_refsource_MISC
https://github.com/tensorzero/tensorzero/releases…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
tensorzero	tensorzero	Affected: < 2026.6.0	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-54457

Vulnerability from fkie_nvd - Published: 2026-08-21 21:17 - Updated: 2026-09-11 18:24

Severity

7.7 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Summary

References

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

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "tensorzero",
          "vendor": "tensorzero",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 2026.6.0"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    }
  ],
  "id": "CVE-2026-54457",
  "lastModified": "2026-09-11T18:24:59.400",
  "metrics": {
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      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.7,
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          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.1,
        "impactScore": 4.0,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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            }
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  },
  "published": "2026-08-21T21:17:00.267",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/tensorzero/tensorzero/commit/0abbc838bae3394fe7491dad7009670d4e3b6cf8"
    },
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}

GHSA-824W-X939-6CMC

Vulnerability from github – Published: 2026-07-15 21:59 – Updated: 2026-07-15 21:59

Summary

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

Details

Impact

The /internal/object_storage endpoint accepts a caller-supplied JSON storage_path parameter that dynamically overrides the TensorZero [object_storage] configuration.

By abusing the filesystem storage type, a caller can read arbitrary files from the gateway filesystem, including files that may contain sensitive credentials. Similarly, by abusing the s3_compatible storage type, the caller can coerce the gateway into making outbound object storage requests to attacker-chosen internal/cloud-metadata endpoints.

This vulnerability only applies when the gateway can be accessed by untrusted callers. If a developer's TensorZero deployment has authentication enabled, only authenticated callers can exploit this vulnerability. If a developer's deployment has authentication disabled, any caller can exploit this vulnerability.

Remediation

The vulnerability has been patched in version 2026.6.0. See PR #7527.

Workarounds

If developers are unable to upgrade a gateway that is exposed to untrusted callers, please block external access to the /internal/object_storage endpoint.

Severity

7.7 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "tensorzero"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2026.6.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-54457"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-552",
      "CWE-918"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-07-15T21:59:40Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "### Impact\n\nThe `/internal/object_storage` endpoint accepts a caller-supplied JSON `storage_path` parameter that dynamically overrides the TensorZero `[object_storage]` configuration.\n\nBy abusing the `filesystem` storage type, a caller can read arbitrary files from the gateway filesystem, including files that may contain sensitive credentials. Similarly, by abusing the `s3_compatible` storage type, the caller can coerce the gateway into making outbound object storage requests to attacker-chosen internal/cloud-metadata endpoints.\n\nThis vulnerability only applies when the gateway can be accessed by untrusted callers. If a developer\u0027s TensorZero deployment has authentication enabled, only authenticated callers can exploit this vulnerability. If a developer\u0027s deployment has authentication disabled, any caller can exploit this vulnerability.\n\n### Remediation\n\nThe vulnerability has been patched in version `2026.6.0`. See PR #7527.\n\n### Workarounds\n\nIf developers are unable to upgrade a gateway that is exposed to untrusted callers, please block external access to the `/internal/object_storage` endpoint.",
  "id": "GHSA-824w-x939-6cmc",
  "modified": "2026-07-15T21:59:40Z",
  "published": "2026-07-15T21:59:40Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/tensorzero/tensorzero/security/advisories/GHSA-824w-x939-6cmc"
    },
    {
      "type": "WEB",
      "url": "https://github.com/tensorzero/tensorzero/commit/0abbc838bae3394fe7491dad7009670d4e3b6cf8"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/tensorzero/tensorzero"
    },
    {
      "type": "WEB",
      "url": "https://github.com/tensorzero/tensorzero/releases/tag/2026.6.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "TensorZero Gateway: Arbitrary file read and SSRF in internal object storage endpoint"
}

PYSEC-2026-3541

Vulnerability from pysec - Published: 2026-07-23 11:41 - Updated: 2026-07-23 14:34

Details

Impact

The /internal/object_storage endpoint accepts a caller-supplied JSON storage_path parameter that dynamically overrides the TensorZero [object_storage] configuration.

Remediation

The vulnerability has been patched in version 2026.6.0. See PR #7527.

Workarounds

If developers are unable to upgrade a gateway that is exposed to untrusted callers, please block external access to the /internal/object_storage endpoint.

Severity

7.7 (High)


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

Impacted products

Name	purl
tensorzero	pkg:pypi/tensorzero

Aliases

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "tensorzero",
        "purl": "pkg:pypi/tensorzero"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2026.6.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2025.10.0",
        "2025.10.1",
        "2025.10.2",
        "2025.10.3",
        "2025.10.4",
        "2025.10.5",
        "2025.10.6",
        "2025.10.7",
        "2025.10.9",
        "2025.11.0",
        "2025.11.1",
        "2025.11.2",
        "2025.11.3",
        "2025.11.4",
        "2025.11.5",
        "2025.11.6",
        "2025.12.0",
        "2025.12.1",
        "2025.12.2",
        "2025.12.3",
        "2025.12.5",
        "2025.12.6",
        "2025.6.0",
        "2025.6.1",
        "2025.6.2",
        "2025.6.3",
        "2025.7.0",
        "2025.7.1",
        "2025.7.2",
        "2025.7.3",
        "2025.7.4",
        "2025.7.5",
        "2025.8.0",
        "2025.8.1",
        "2025.8.2",
        "2025.8.3",
        "2025.8.4",
        "2025.8.5",
        "2025.9.0",
        "2025.9.1",
        "2025.9.3",
        "2025.9.4",
        "2025.9.5",
        "2025.9.6",
        "2026.1.0",
        "2026.1.1",
        "2026.1.2",
        "2026.1.5",
        "2026.1.6",
        "2026.1.7",
        "2026.1.8",
        "2026.2.0",
        "2026.2.1",
        "2026.2.2",
        "2026.3.0",
        "2026.3.1",
        "2026.3.2",
        "2026.3.3",
        "2026.3.4",
        "2026.4.0",
        "2026.4.1",
        "2026.5.0",
        "2026.5.1",
        "2026.5.2"
      ]
    }
  ],
  "aliases": [
    "CVE-2026-54457",
    "GHSA-824w-x939-6cmc"
  ],
  "details": "### Impact\n\nThe `/internal/object_storage` endpoint accepts a caller-supplied JSON `storage_path` parameter that dynamically overrides the TensorZero `[object_storage]` configuration.\n\nBy abusing the `filesystem` storage type, a caller can read arbitrary files from the gateway filesystem, including files that may contain sensitive credentials. Similarly, by abusing the `s3_compatible` storage type, the caller can coerce the gateway into making outbound object storage requests to attacker-chosen internal/cloud-metadata endpoints.\n\nThis vulnerability only applies when the gateway can be accessed by untrusted callers. If a developer\u0027s TensorZero deployment has authentication enabled, only authenticated callers can exploit this vulnerability. If a developer\u0027s deployment has authentication disabled, any caller can exploit this vulnerability.\n\n### Remediation\n\nThe vulnerability has been patched in version `2026.6.0`. See PR #7527.\n\n### Workarounds\n\nIf developers are unable to upgrade a gateway that is exposed to untrusted callers, please block external access to the `/internal/object_storage` endpoint.",
  "id": "PYSEC-2026-3541",
  "modified": "2026-07-23T14:34:32.719903Z",
  "published": "2026-07-23T11:41:45.645277Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/tensorzero/tensorzero/security/advisories/GHSA-824w-x939-6cmc"
    },
    {
      "type": "WEB",
      "url": "https://github.com/tensorzero/tensorzero/commit/0abbc838bae3394fe7491dad7009670d4e3b6cf8"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/tensorzero/tensorzero"
    },
    {
      "type": "WEB",
      "url": "https://github.com/tensorzero/tensorzero/releases/tag/2026.6.0"
    },
    {
      "type": "PACKAGE",
      "url": "https://pypi.org/project/tensorzero"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-824w-x939-6cmc"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-54457"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "TensorZero Gateway: Arbitrary file read and SSRF in internal object storage endpoint"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-54457 (GCVE-0-2026-54457)

FKIE_CVE-2026-54457

GHSA-824W-X939-6CMC

Impact

Remediation

Workarounds

PYSEC-2026-3541

Impact

Remediation

Workarounds

Tags

Sightings

Nomenclature

Related by attack behaviour