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CRITICAL

CVE-2026-23537

CVSS v3

9.1

CRITICAL

EPSS Score

1.0 %

exploit probability, as of 2026-09-25

CISA KEV

No

known exploited

Exploitation

—

SSVC status

Description

A vulnerability has been identified in the Feast Feature Server’s `/save-document` endpoint that allows an unauthenticated remote attacker to write arbitrary JSON files to the server's filesystem. Although the system attempts to restrict file locations, these protections can be bypassed, enabling an attacker to overwrite vital application configurations or startup scripts. Because this flaw requires no credentials or special privileges, any attacker with network access to the server can potentia

Technical details

Published
2026-07-01
Last Modified
2026-07-02

Frequently asked questions

What is CVE-2026-23537?

A vulnerability has been identified in the Feast Feature Server’s `/save-document` endpoint that allows an unauthenticated remote attacker to write arbitrary JSON files to the server's filesystem. Although the system attempts to restrict file locations, these protections can be bypassed, enabling an attacker to overwrite vital application configurations or startup scripts. Because this flaw requires no credentials or special privileges, any attacker with network access to the server can potentia

Is CVE-2026-23537 actively exploited?

Active exploitation of CVE-2026-23537 has not been confirmed. Its EPSS score was 1.0% on 2026-09-25, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-23537?

CVE-2026-23537 has a CVSS v3 base score of 9.1 (CRITICAL severity).

Is CVE-2026-23537 affecting your environment?

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