CVE-2025-27520

Public Exploit
BentoML Allows Remote Code Execution (RCE) via Insecure Deserialization

Description

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.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
EPSS 48.36% Top 5%
Third-Party Advisory github.com
Affected: bentoml BentoML
Published at:
Updated at:

References

Link Tags
https://github.com/bentoml/BentoML/security/advisories/GHSA-33xw-247w-6hmc third party advisory exploit
https://github.com/bentoml/BentoML/commit/b35f4f4fcc53a8c3fe8ed9c18a013fe0a728e194 patch

Frequently Asked Questions

What is the severity of CVE-2025-27520?
CVE-2025-27520 has been scored as a critical severity vulnerability.
How to fix CVE-2025-27520?
To fix CVE-2025-27520, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-27520 being actively exploited in the wild?
It is possible that CVE-2025-27520 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~48% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-27520?
CVE-2025-27520 affects bentoml BentoML.
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