CVE-2021-43045: Apache Avro

High severity, CVSS 7.5. EPSS: 3% chance of exploitation in the next 30 days.

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.

Affected products

• Apache Avro: before 1.11.0 (fixed in 1.11.0)

Published 2022-01-06. Last modified 2026-06-17.