Skip to content
Heist/ feed
Back to feed
High

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

Type: advisorySources: OSV

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.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2026-54457
Confirmed fixed CVEs
Not specified
Updated in this feed
7 Nov 2026, 01:33 UTC · Revision 1

Source evidence

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

core-osv · Original source

Published 21 Aug 2026, 20:34 UTC

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.

osv:CVE-2026-54457
Complete source record
{
  "id": "603d857cff168dc8795c520c839c3f81133d4c1591407d0080936d2bf21341ae",
  "url": "https://osv.dev/vulnerability/CVE-2026-54457",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "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.",
    "evidence": "osv:CVE-2026-54457",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-54457",
      "aliases": [
        "CVE-2026-54457",
        "GHSA-824w-x939-6cmc",
        "PYSEC-2026-3541"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/tensorzero/tensorzero",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "62eb8f63e8ec62018d70420dbf1a8c5d1c026315"
                },
                {
                  "fixed": "0abbc838bae3394fe7491dad7009670d4e3b6cf8"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2026.6.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "0abbc838bae3394fe7491dad7009670d4e3b6cf8"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "62eb8f63e8ec62018d70420dbf1a8c5d1c026315"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "2026.6.0"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2026.5.2",
            "2026.5.1",
            "2026.5.0",
            "2026.4.1",
            "2026.4.0",
            "2026.3.4",
            "2026.3.3",
            "2026.3.2",
            "2026.3.1",
            "2026.3.0",
            "2026.2.2",
            "2026.2.1",
            "2026.2.0",
            "2026.1.8",
            "2026.1.7",
            "2026.1.6",
            "2026.1.5",
            "2026.1.2",
            "2026.1.1",
            "2026.1.0",
            "2025.12.6",
            "2025.12.5",
            "2025.12.4",
            "2025.12.3",
            "2025.12.2",
            "2025.12.1",
            "2025.12.0",
            "2025.11.5",
            "2025.11.6",
            "2025.11.4",
            "2025.11.3",
            "2025.11.2",
            "2025.11.1",
            "2025.11.0",
            "2025.10.9",
            "2025.10.7",
            "2025.10.6",
            "2025.10.5",
            "2025.10.4",
            "2025.10.3",
            "2025.10.2",
            "2025.10.1",
            "2025.10.0",
            "2025.9.6",
            "2025.9.5",
            "2025.9.4",
            "2025.9.3",
            "2025.9.1",
            "2025.9.0",
            "2025.8.5",
            "2025.8.4",
            "2025.8.3",
            "2025.8.2",
            "2025.8.1",
            "2025.8.0",
            "2025.7.5",
            "2025.7.4",
            "2025.7.3",
            "2025.7.2",
            "2025.7.1",
            "2025.7.0",
            "2025.6.3",
            "2025.6.2",
            "2025.6.1",
            "2025.6.0",
            "2025.5.9",
            "2025.5.8",
            "2025.5.7",
            "2025.5.6",
            "2025.5.5",
            "2025.5.4",
            "2025.5.3",
            "2025.5.2",
            "2025.5.1",
            "2025.5.0",
            "2025.4.8",
            "2025.4.7",
            "2025.4.6",
            "2025.4.5",
            "2025.4.4",
            "2025.4.3",
            "2025.4.2",
            "2025.04.1",
            "2025.04.0",
            "2025.03.4",
            "2025.03.3",
            "2025.03.2",
            "2025.03.1",
            "2025.03.0",
            "2025.02.6",
            "2025.02.5",
            "2025.02.4",
            "2025.02.3",
            "2025.02.2",
            "2025.02.1",
            "2025.02.0",
            "2025.01.9",
            "2025.01.8",
            "2025.01.7",
            "2025.01.6",
            "2025.01.5",
            "2025.01.4",
            "2025.01.3",
            "2025.01.2",
            "2025.01.1",
            "2025.01.0",
            "2024.12.3",
            "2024.12.2",
            "2024.12.1",
            "2024.12.0",
            "2024.11.4",
            "2024.11.3",
            "2024.11.2",
            "2024.11.1",
            "2024.11.0",
            "2024.10.1",
            "2024.10.0",
            "2024.09.3",
            "2024.09.2",
            "2024.09.1",
            "2024.09.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54457.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:48.879503275Z",
      "provider": "osv",
      "references": [
        "https://github.com/tensorzero/tensorzero/releases/tag/2026.6.0",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54457.json",
        "https://github.com/tensorzero/tensorzero/security/advisories/GHSA-824w-x939-6cmc",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-54457",
        "https://github.com/tensorzero/tensorzero/commit/0abbc838bae3394fe7491dad7009670d4e3b6cf8"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-552",
          "CWE-918"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54457.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-54457",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 517016,
  "published_at": "2026-08-21T20:34:03.632+00:00"
}