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CVE-2021-43811

26
FAUCET Score

CVE-2021-43811 affects Amazon Sockeye, an open-source Neural Machine Translation framework, due to unsafe YAML loading in versions prior to 2.3.24. This vulnerability allows an attacker to embed arbitrary code within model configuration files. With a CVSS score of 7.8 (HIGH), successful exploitation requires user interaction (UI:R) to download and run a maliciously crafted model, leading to potential complete compromise of confidentiality, integrity, and availability (C:H/I:H/A:H) on the local system. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.3.24CPE matchmatch criteria
cpe:2.3:a:amazon:sockeye:*:*:*:*:*:python:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.42%
Probability of exploitation in next 30 days
EPSS Percentile
82.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0242 is in the 83rd percentile among its peer group of 11,617 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
pippatch availablevia ghsa
Product: sockeyeFixed in: 2.3.24

Vendor Advisories (1)

pipGHSA-ggmr-44cv-24pmhigh

Code injection via unsafe YAML loading

Dec 9, 2021

References

github.com / awslabs/sockeye/pull/964
PatchThird Party Advisory
github.com / awslabs/sockeye/releases/tag/2.3.24
Release NotesThird Party Advisory
github.com / awslabs/sockeye/security/advisories/GHSA-ggmr-44cv-24pm
Third Party Advisory