CVE-2021-43811

Name: CVE-2021-43811
Creator: NVD / NIST
Published: 2021-12-08T23:15:08.123+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 2.42%

Last modified Jun 17, 2026

CVE-2021-43811 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. Sockeye is an open-source sequence-to-sequence framework for Neural Machine Translation built on PyTorch. Sockeye uses YAML to store model and data configurations on disk. EPSS estimates a 2.42% chance of exploitation in the next 30 days.

Description

Sockeye is an open-source sequence-to-sequence framework for Neural Machine Translation built on PyTorch. Sockeye uses YAML to store model and data configurations on disk. Versions below 2.3.24 use unsafe YAML loading, which can be made to execute arbitrary code embedded in config files. An attacker can add malicious code to the config file of a trained model and attempt to convince users to download and run it. If users run the model, the embedded code will run locally. The issue is fixed in version 2.3.24.

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

2.42%

82.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-94

Affected Software

Vendor	Product	Versions
Amazon	Sockeye	< 2.3.24

References

https://github.com/awslabs/sockeye/pull/964Patch, Third Party Advisory
https://github.com/awslabs/sockeye/releases/tag/2.3.24Release Notes, Third Party Advisory
https://github.com/awslabs/sockeye/security/advisories/GHSA-ggmr-44cv-24pmThird Party Advisory
https://github.com/awslabs/sockeye/pull/964Patch, Third Party Advisory
https://github.com/awslabs/sockeye/releases/tag/2.3.24Release Notes, Third Party Advisory
https://github.com/awslabs/sockeye/security/advisories/GHSA-ggmr-44cv-24pmThird Party Advisory

Timeline

Published: Dec 8, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-43811?

How severe is CVE-2021-43811?

CVE-2021-43811 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 2.42% probability of exploitation in the next 30 days.

How do I fix CVE-2021-43811?

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-2021-43811?

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

Scan your code now

Source: NVD / NIST