Feast: unauthenticated arbitrary file write
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-862.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Feast | Feast Feature Server | before 0.59.0 | 0.59.0 | Patch available | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | Not affected | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | Not affected | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | Not affected | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | Not affected | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | Not affected | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | Not affected | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | Not affected | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | Not affected | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | Not affected | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | Not affected | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | Not affected | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | Not affected | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | Not affected | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | Not affected | CNA |
- Feast Feature Server VendorFeast Affected before 0.59.0 Fixed in 0.59.0 Patch available CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — Not affected CNA
Remediation
- Fix · CNA Feast Feature Server (Feast) Fixed in 0.59.0
Vendor assessments
Red Hat
Red Hat rating: Critical. Red Hat's page for this CVE →
Not affected: 1 product
- Red Hat OpenShift AI (RHOAI)
Timeline
- 2026-10-02 Threatist record created from CVE-2026-23537
- 2026-10-03 Alias added: GHSA-4m9c-5f58-453x
References
More Feast vulnerabilities
- TI-2026-18962 Feast: resource exhaustion via websocket endpoint CVSS 3.1HIGH 7.5
Sources
- CVE-2026-23537 · CVE Program
- CVE-2026-23537 · NVD
- FIRST EPSS
- GHSA-4m9c-5f58-453x · GitHub Advisory Database · CC BY 4.0
- CVE-2026-23537 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences