CVE-2023-47204: transmute-core unsafe YAML deserialization vulnerability
Summary
CVE-2023-47204: transmute-core unsafe YAML deserialization vulnerability. Affects transmute-core versions < 1.13.5. Fixed in 1.13.5. How to fix ↓
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
Habilume
Habit tracker with a companion that grows with you
Complete habits, earn Lume Points, and watch your Lume grow as you stay consistent.
Background
transmute-core is a Python package available on PyPI that provides a set of utilities for working with API contracts and data transformation. It is commonly used in web development projects to simplify the process of handling API requests and responses. Unfortunately, versions of transmute-core prior to 1.13.5 are vulnerable to an unsafe YAML deserialization issue, which can be exploited by attackers to execute arbitrary Python code.
Vulnerability Detail
The vulnerability in transmute-core arises from unsafe YAML deserialization in the yaml.Loader component. This allows attackers to craft malicious YAML payloads that, when processed by transmute-core, can trigger the execution of arbitrary Python code. The impact of this vulnerability can be severe, as it grants attackers the ability to execute arbitrary commands on the affected system, potentially leading to unauthorized access, data breaches, or other malicious activities.
How To Fix
Latest published version: 1.13.7 as of 22 Oct 2026
pip install --upgrade "transmute-core==1.13.7"Upgrading to it may include breaking changes; the version below is the minimum fixed release for this vulnerability.
If you need the minimum change
1.13.5
This is the first release that contains the fix.
pip install --upgrade "transmute-core==1.13.5"Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
There is no known workaround for this vulnerability. It is crucial to update to the fixed version of transmute-core as soon as possible to mitigate the risk of exploitation.
Conclusion
The transmute-core package prior to version 1.13.5 is vulnerable to an unsafe YAML deserialization issue, which can be exploited by attackers to execute arbitrary Python code. To mitigate this vulnerability, it is crucial to update to the fixed version of transmute-core (1.13.5 or later). For further support on vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for transmute-core →
FAQ
transmute-core is a Python package that provides utilities for working with API contracts and data transformation in web development projects.
The vulnerability allows attackers to execute arbitrary Python code, potentially leading to unauthorized access, data breaches, or other malicious activities.
To fix this vulnerability, update the transmute-core package to version 1.13.5 or later.
No, there is no known workaround for this vulnerability. Updating to the fixed version is the recommended solution.
You can find more information about this vulnerability in the official GitHub advisory: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/11/GHSA-w9cp-3x79-2p8p/GHSA-w9cp-3x79-2p8p.json
References
Habilume
Habit tracker with a companion that grows with you
Complete habits, earn Lume Points, and watch your Lume grow as you stay consistent.
