CVE-2025-27520

BentoML Allows Remote Code Execution (RCE) via Insecure Deserialization

CVSS 9.8 CRITICALEPSS 44.4%CWE-502

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

bentoml · BentoML

public PoCs found — 2

githubgithub.com/amalpvatayam67/day09-bentoml-deser-lab★ 0 githubgithub.com/Evillm/CVE-2025-27520-PoC★ 0

⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

Want to know if your infrastructure is exposed to this?

Talk to TrueHacking →

References

https://github.com/bentoml/BentoML/commit/b35f4f4fcc53a8c3fe8ed9c18a013fe0a728e194 https://github.com/bentoml/BentoML/security/advisories/GHSA-33xw-247w-6hmc