{"id":"CVE-2026-54457","aliases":["GHSA-824w-x939-6cmc","PYSEC-2026-3541"],"url":"https://o3.security/vulnerability/CVE-2026-54457","summary":"TensorZero: Arbitrary file read and SSRF in TensorZero Gateway's internal object storage endpoint","details":"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.","published":"2026-08-21T20:34:03.632Z","modified":"2026-08-27T11:31:00.327131453Z","cvss":{"score":7.7,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N"},"epss":{"score":0.00294,"percentile":0.21832,"asOf":"2026-09-10"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"tensorzero","fixedVersion":"2026.6.0"}],"fix":{"url":"https://github.com/tensorzero/tensorzero/commit/0abbc838bae3394fe7491dad7009670d4e3b6cf8","label":"tensorzero/tensorzero@0abbc83"},"references":[{"type":"WEB","url":"https://github.com/tensorzero/tensorzero/releases/tag/2026.6.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54457.json"},{"type":"ADVISORY","url":"https://github.com/tensorzero/tensorzero/security/advisories/GHSA-824w-x939-6cmc"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54457"},{"type":"FIX","url":"https://github.com/tensorzero/tensorzero/commit/0abbc838bae3394fe7491dad7009670d4e3b6cf8"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-27T11:31:00.327131453Z"}}