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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.05%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 potentially compromise the integrity of the system. This could lead to unauthorized system modifications, denial of service through disk exhaustion, or potential remote code execution.
- CVSS 3.1
- 9.1 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
- EPSS
- 1.05% probability · 62th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-862
- Source
- secalert@redhat.com
References
- https://access.redhat.com/security/cve/CVE-2026-23537
- https://bugzilla.redhat.com/show_bug.cgi?id=2429304
- https://github.com/red-hat-data-services/feast/pull/192
- https://access.redhat.com/security/cve/CVE-2026-23537
- https://bugzilla.redhat.com/show_bug.cgi?id=2429304
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23537.json
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.