Deserialization Vulnerability in BentoML's Runner Server in bentoml/bentoml
Priority HIGH 82CWE-502Published · Updated
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
- No fix listed
Attack profile from CVSS 3.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-502.
Summary
A deserialization vulnerability exists in BentoML's runner server in bentoml/bentoml versions <=1.3.4.post1. By setting specific parameters, an attacker can execute unauthorized arbitrary code on the server, causing severe harm. The vulnerability is triggered when the args-number parameter is greater than 1, leading to automatic deserialization and arbitrary code execution.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00931 60th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
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/bentoml | up to latest | — | No fix listed | CNA |
| — | bentoml (PyPI) | up to 1.4.5 | — | No fix listed | GHSA-9g44-gwvm-hc44 |
- bentoml/bentoml Vendorbentoml Affected up to latest Fixed in — No fix listed CNA
- bentoml (PyPI) Vendor— Affected up to 1.4.5 Fixed in — No fix listed GHSA-9g44-gwvm-hc44
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2024-9070
- 2026-10-03 Alias added: GHSA-9g44-gwvm-hc44
References
Other 6
- https://huntr.com/bounties/7be6fc22-be18-44ee-a001-ac7158d5e1a5
- https://github.com/bentoml/BentoML
- https://github.com/bentoml/BentoML/blob/a6f5f937be6ec278f3d4f3bbc6f3c8f9564820d7/src/bentoml/_internal/server/runner_app.py#L297
- https://github.com/bentoml/BentoML/blob/v1.4.5/src/bentoml/_internal/server/runner_app.py#L301
- https://github.com/pypa/advisory-database/tree/main/vulns/bentoml/PYSEC-2026-295.yaml
- https://pypi.org/project/bentoml
More bentoml vulnerabilities
- TI-2025-34190 BentoML is Vulnerable to an SSRF Attack Through File Upload Processing CVSS 3.1CRITICAL 9.9
- TI-2025-23454 Insecure Deserialization leads to RCE in BentoML's runner server CVSS 3.1CRITICAL 9.8
- TI-2025-20352 BentoML Allows Remote Code Execution (RCE) via Insecure Deserialization CVSS 3.1CRITICAL 9.8
- TI-2024-02720 Insecure Deserialization Leading to RCE in bentoml/bentoml CVSS 3.1CRITICAL 10.0
- 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
Sources
- CVE-2024-9070 · CVE Program
- CVE-2024-9070 · NVD
- FIRST EPSS
- GHSA-9g44-gwvm-hc44 · GitHub Advisory Database · CC BY 4.0
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