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TI-2025-20352 Aliases CVE-2025-27520GHSA-33xw-247w-6hmc

BentoML Allows Remote Code Execution (RCE) via Insecure Deserialization

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
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. A Remote Code Execution (RCE) vulnerability caused by insecure deserialization has been identified in the latest version (v1.4.2) of BentoML. It allows any unauthenticated user to execute arbitrary code on the server. It exists an unsafe code segment in serde.py. This vulnerability is fixed in 1.4.3.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.4062 98th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed BentoML (bentoml): 1.4.3bentoml (PyPI): 1.4.3

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

VendorProductAffected versionsFixed inStatusSource
bentomlBentoML1.3.4 to before 1.4.31.4.3Patch availableCNA
—bentoml (PyPI)1.3.4 to before 1.4.31.4.3Patch availableGHSA-33xw-247w-6hmc
  • BentoML Vendorbentoml Affected 1.3.4 to before 1.4.3 Fixed in 1.4.3 Patch available CNA
  • bentoml (PyPI) Vendor— Affected 1.3.4 to before 1.4.3 Fixed in 1.4.3 Patch available GHSA-33xw-247w-6hmc

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:bentoml:bentoml:*:*:*:*:*:*:*:*1.3.4 – 1.4.2Vulnerablebentoml
  • cpe:2.3:a:bentoml:bentoml:*:*:*:*:*:*:*:* Versions 1.3.4 – 1.4.2 Vulnerable ·bentoml

Remediation

  • Fix · CNA BentoML (bentoml) Fixed in 1.4.3
  • Fix · GHSA-33xw-247w-6hmc bentoml (PyPI) Fixed in 1.4.3 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-27520
  2. 2026-10-03 Alias added: GHSA-33xw-247w-6hmc

References

Exploit 1

Patch 1

Advisory 1

Other 3

  • 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-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
See all 10 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences