CVE-2023-47204

transmute-core unsafe YAML deserialization vulnerability

9.8 CriticalFix available

Unsafe YAML deserialization in yaml.Loader in transmute-core before 1.13.5 allows attackers to execute arbitrary Python code.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

0.95%Up 0.9 points since Nov 2, 2023

What each source reports

NVD Score used 9.8

Unsafe YAML deserialization in yaml.Loader in transmute-core before 1.13.5 allows attackers to execute arbitrary Python code.

Record: CVE-2023-47204
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-502
Updated: 2026-11-02

CVE List 9.8

Unsafe YAML deserialization in yaml.Loader in transmute-core before 1.13.5 allows attackers to execute arbitrary Python code.

Record: CVE-2023-47204
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-502
Updated: 2026-11-02

EUVDEUVD-2023-0249 9.8

Unsafe YAML deserialization in yaml.Loader in transmute-core before 1.13.5 allows attackers to execute arbitrary Python code.

Record: EUVD-2023-0249
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-03

GitHub AdvisoriesGHSA-w9cp-3x79-2p8p 9.3

transmute-core unsafe YAML deserialization vulnerability

Unsafe YAML deserialization in yaml.Loader in transmute-core before 1.13.5 allows attackers to execute arbitrary Python code.

Record: GHSA-w9cp-3x79-2p8p
CVSS 4.0: 9.3 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-502
Updated: 2026-11-02

OSV 9.8

Unsafe YAML deserialization in yaml.Loader in transmute-core before 1.13.5 allows attackers to execute arbitrary Python code.

Record: CVE-2023-47204
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVGHSA-w9cp-3x79-2p8p 9.3

transmute-core unsafe YAML deserialization vulnerability

Unsafe YAML deserialization in yaml.Loader in transmute-core before 1.13.5 allows attackers to execute arbitrary Python code.

Record: GHSA-w9cp-3x79-2p8p
CVSS 4.0: 9.3 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-502
Updated: 2026-11-02

OSVPYSEC-2023-223 No score

Unsafe YAML deserialization in yaml.Loader in transmute-core before 1.13.5 allows attackers to execute arbitrary Python code.

Record: PYSEC-2023-223
Updated: 2026-11-02

Affected products

toumorokoshi transmute-core

Affected packages

Affected packages
Package	Affected	Fixed
`transmute-core` PyPI	before 1.13.5	1.13.5
`transmute-core` PyPI	before 1.13.5, plus listed versions 0.1.00.1.0b00.1.10.1.30.1.4 Show 45 moreShow less 0.1.4b00.1.50.1.60.2.00.2.10.2.100.2.110.2.120.2.20.2.30.2.40.2.50.2.60.2.70.2.80.2.90.3.00.3.10.4.00.4.10.4.100.4.110.4.120.4.20.4.30.4.40.4.50.4.60.4.70.4.80.4.90.5.00.6.01.0.01.0.11.1.01.1.11.10.11.11.01.12.01.13.01.13.11.13.21.13.31.13.4	1.13.5

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2023-47204 is a critical vulnerability (CVSS 9.8) in Toumorokoshi Transmute-core, published November 2, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.95%, the 61st percentile. Fixed in transmute-core 1.13.5.

References

This page doesn't list everything

Left out here: 23 versions. The JSON record has them.