# CVE-2025-32375: Insecure Deserialization leads to RCE in BentoML's runner server

- Exploited (CISA KEV): no
- Published: 2025-04-09
- CVSS: 9.8 CRITICAL (v3.1)
- EPSS: 52.4% (99th percentile)
- CWE: CWE-502

BentoML is a Python library for building online serving systems optimized for AI apps and model inference. Prior to 1.4.8, there was an insecure deserialization in BentoML's runner server. By setting specific headers and parameters in the POST request, it is possible to execute any unauthorized arbitrary code on the server, which will grant the attackers to have the initial access and information disclosure on the server. This vulnerability is fixed in 1.4.8.

## Edge WAF coverage (claimed by vendors, not measured)

| Vendor | Status | First rule | Days after publication |
|---|---|---|---|
| Cloudflare | No public claim | — | — |
| AWS | No public claim | — | — |
| Microsoft Azure | No public claim | — | — |
| Google Cloud | No public claim | — | — |
| Fastly | Before feed history | — | — |
| F5 | Rule published | 2025-12-04 | 239 |
| Akamai | No public source | — | — |
| OWASP CRS | No public claim | — | — |

### F5

- 2025-12-04 · new · rule 200204049
  > Added: signature 200204049 "BentoML Insecure Deserialization" (Server Side Code Injection, risk High), systems: Python. References: CVE-2025-32375.
  Source: https://docs.cloud.f5.com/docs-v2/platform/changelogs/security-details-changelog

"No public claim" means no vendor statement names this CVE; "Before feed history" means the CVE is older than the vendor feed. In both cases generic rules may still block it.

HTML: https://cve.vigilbase.com/cve/CVE-2025-32375 · JSON: https://cve.vigilbase.com/api/v1/cves/CVE-2025-32375