Insecure Deserialization leads to RCE in BentoML's runner server
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-502.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Total
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 |
|---|---|---|---|---|---|
| bentoml | BentoML | 1.0 to before 1.4.8 | 1.4.8 | Patch available | CNA |
| — | bentoml (PyPI) | 1.0.0a1 to before 1.4.8 | 1.4.8 | Patch available | GHSA-7v4r-c989-xh26 |
- BentoML Vendorbentoml Affected 1.0 to before 1.4.8 Fixed in 1.4.8 Patch available CNA
- bentoml (PyPI) Vendor— Affected 1.0.0a1 to before 1.4.8 Fixed in 1.4.8 Patch available GHSA-7v4r-c989-xh26
Remediation
- Fix · CNA BentoML (bentoml) Fixed in 1.4.8
- Fix · GHSA-7v4r-c989-xh26 bentoml (PyPI) Fixed in 1.4.8 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2025-32375
- 2026-10-03 Alias added: GHSA-7v4r-c989-xh26
References
More Bentoml vulnerabilities
- TI-2025-34190 BentoML is Vulnerable to an SSRF Attack Through File Upload Processing CVSS 3.1CRITICAL 9.9
- TI-2025-20352 BentoML Allows Remote Code Execution (RCE) via Insecure Deserialization CVSS 3.1CRITICAL 9.8
- TI-2026-27247 BentoML has a Server-Side Template Injection via unsandboxed Jinja2 Environment in Dockerfile generation CVSS 3.1CRITICAL 9.6
- TI-2026-32312 BentoML: Dockerfile command injection via envs[*].name in bentofile.yaml CVSS 3.1HIGH 8.8
- TI-2026-32311 BentoML: Dockerfile command injection via docker.base_image CVSS 3.1HIGH 8.8
- TI-2026-22249 BentoML has an Arbitrary File Write via Symlink Path Traversal in Tar Extraction CVSS 4.0HIGH 8.6
Sources
- CVE-2025-32375 · CVE Program
- CVE-2025-32375 · NVD
- FIRST EPSS
- GHSA-7v4r-c989-xh26 · GitHub Advisory Database · CC BY 4.0
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