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Vulnerability record · CVE-2021-43045 · published 6 January 2022

CVE-2021-43045: Apache avro allocation without limits vulnerability

Apache · Avro

A vulnerability in the .NET SDK of Apache Avro allows an attacker to allocate excessive resources, potentially causing a denial-of-service attack. This issue affects .NET applications using Apache Avro version 1.10.2 and prior versions. Users should update to version 1.11.0 which addresses this issue.

7.5 CVSS 3.1 High EPSS 3.0% · top 13.3% CWE-770 · Allocation without limits
7.5CVSS 3.1 base score, v2 5.0
3.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

A vulnerability in the .NET SDK of Apache Avro allows an attacker to allocate excessive resources, potentially causing a denial-of-service attack. This issue affects .NET applications using Apache Avro version 1.10.2 and prior versions. Users should update to version 1.11.0 which addresses this issue.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.openwall.com/lists/oss-security/2022/01/06/8 Mailing ListThird Party Advisory
https://lists.apache.org/thread/5fttw9vk6gd2p3b846nox7hcj5469xfd Mailing ListVendor Advisory
http://www.openwall.com/lists/oss-security/2022/01/06/8 Mailing ListThird Party Advisory
https://lists.apache.org/thread/5fttw9vk6gd2p3b846nox7hcj5469xfd Mailing ListVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-43045), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.