CVE-2025-27520

Name: CVE-2025-27520
Creator: NVD / NIST
Published: 2025-04-04T15:15:47.927+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 44.36%

Last modified Jun 17, 2026

CVE-2025-27520 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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. EPSS estimates a 44.36% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

44.36%

98.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-502

Affected Software

Vendor	Product	Versions
Bentoml	Bentoml	>= 1.3.4, <= 1.4.2

References

https://github.com/bentoml/BentoML/commit/b35f4f4fcc53a8c3fe8ed9c18a013fe0a728e194Patch
https://github.com/bentoml/BentoML/security/advisories/GHSA-33xw-247w-6hmcExploit, Third Party Advisory
https://github.com/bentoml/BentoML/security/advisories/GHSA-33xw-247w-6hmcExploit, Third Party Advisory

Timeline

Published: Apr 4, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-27520?

How severe is CVE-2025-27520?

CVE-2025-27520 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 44.36% probability of exploitation in the next 30 days.

How do I fix CVE-2025-27520?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-27520?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST