CVE-2021-43669

Name: CVE-2021-43669
Creator: NVD / NIST
Published: 2021-11-18T16:15:09.323+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.09%

Last modified Jun 17, 2026

CVE-2021-43669 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A vulnerability has been detected in HyperLedger Fabric v1.4.0, v2.0.0, v2.0.1, v2.3.0. It can easily break down as many orderers as the attacker wants. EPSS estimates a 1.09% chance of exploitation in the next 30 days.

Description

A vulnerability has been detected in HyperLedger Fabric v1.4.0, v2.0.0, v2.0.1, v2.3.0. It can easily break down as many orderers as the attacker wants. This bug can be leveraged by constructing a message whose header is invalid to the interface Order. This bug has been admitted and fixed by the developers of Fabric.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.09%

61.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-444

Affected Software

Vendor	Product	Versions
Linuxfoundation	Fabric	1.4.0
Linuxfoundation	Fabric	2.0.0
Linuxfoundation	Fabric	2.0.1
Linuxfoundation	Fabric	2.3.0

References

https://github.com/hyperledger/fabric/pull/2828Patch, Third Party Advisory
https://jira.hyperledger.org/browse/FAB-18528Vendor Advisory
https://github.com/hyperledger/fabric/pull/2828Patch, Third Party Advisory
https://jira.hyperledger.org/browse/FAB-18528Vendor Advisory

Timeline

Published: Nov 18, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-43669?

How severe is CVE-2021-43669?

CVE-2021-43669 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.09% probability of exploitation in the next 30 days.

How do I fix CVE-2021-43669?

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-2021-43669?

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

Scan your code now

Source: NVD / NIST