What is CVE-2026-54457?

CVE-2026-54457 is a high-severity vulnerability in Tensorzero, classified under Files or Directories Accessible to External Parties. CVSS score: 7.7/10. Published 2026-08-21.

How severe is CVE-2026-54457?

High severity. CVSS v3 base score is 7.7 out of 10.

SSRF in Tensorzero

CVE-2026-54457

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 v3 metric

CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N.

Affected products

Tensorzero — versions < 2026.6.0

Weakness classification (CWE)

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-54457?: CVE-2026-54457 is a high-severity vulnerability in Tensorzero, classified under Files or Directories Accessible to External Parties. CVSS score: 7.7/10. Published 2026-08-21.
How severe is CVE-2026-54457?: High severity. CVSS v3 base score is 7.7 out of 10.