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Vulnerability record · CVE-2026-54457 · published 21 August 2026

CVE-2026-54457: Server-side request forgery (SSRF) vulnerability

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.

7.7 CVSS 3.1 High EPSS 0.40% · top 68.2% CWE-552 · CWE-552CWE-918 · Server-side request forgery (SSRF) Awaiting Analysis
7.7CVSS 3.1 base score
0.40%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
11 Sep 2026Last modified by NVD

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.

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

References

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

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Source: NIST National Vulnerability Database (record CVE-2026-54457), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.